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Slack water
Slack water, also called slack tide, is when a tidal current's speed is near zero, occurring between the flood and ebb currents as the tide changes.
Slacker
A slacker is a person who shirks work or avoids exertion, and, since about 1995, a member of a generation seen as refusing to join the social mainstream.
Slacker (film)
Slacker is Richard Linklater's 1990/1991 no-plot indie comedy following over a hundred Austin, Texas eccentrics; shot on 16mm in summer 1989 for $23,000 and released by Orion Classics in July 1991.
Slacklining
Slacklining: balancing, walking, or tricklining on 2-5 cm stretchy synthetic webbing rigged between two anchors. Born in 1980s Yosemite climbing scene (Grosowsky, Ellington); disciplines include trickline, longline, waterline, and highline; used in balance training and rehabilitation.
Slacktivism
Slacktivism (slactivism), also called clicktivism or hashtag activism, is low-effort online support for causes, coined positively in 1995 by Fred Clark and Dwight Ozard, now a pejorative with mixed research verdicts.
Slackware
Slackware, also known as Slackware Linux, is a Linux distribution created by Patrick Volkerding, first released in July 1993 and the oldest still maintained, known for plain text configuration and a BSD-style init.
Slađana Milošević
Slađana Milošević (Слађана Милошевић), born Aleksandra Milošević, was a Serbian singer from Belgrade, a defining figure of Yugoslav new wave whose "Princeza" was 1984's best-selling single.
Slade
Slade: English glam rock band formed in Wolverhampton in 1966, also styled Ambrose Slade and Slade II. Noddy Holder, Dave Hill, Jim Lea, Don Powell; 17 consecutive UK Top 20 hits 1971–76, six No.1s, "Merry Xmas Everybody".
Slade Gorton
Slade Gorton (Thomas Slade Gorton III, 1928–2020), Republican U.S. senator from Washington 1981–1987 and 1989–2001, three-term state attorney general, 9/11 commissioner, known for tribal-rights and environmental feuds and losing to Cantwell by 2,229 votes in 2000.
Slade House
Slade House is David Mitchell's 2015 haunted-house novel, born from the Twitter story "The Right Sort" and companion to The Bone Clocks. Every nine years from 1979 to 2015, the Grayer twins lure a victim through a black door in Slade Alley to consume their soul.
Sládkovičovo
Sládkovičovo (Magyardiószeg, Diószeg) is a town in Galanta District, Slovakia, first attested in 1326, renamed from Velký Diosek in 1948, with Neolithic to Roman-period cemeteries and a 19th-century market-town history.
SLAF-seq
SLAF-seq (specific-locus amplified fragment sequencing) is a reduced-representation sequencing method, introduced in 2013, that digests DNA with restriction enzymes to discover and genotype large numbers of SNPs at low cost.
Slag
Slag, also known as furnace slag, is the stony nonmetallic byproduct that separates from metal during smelting and refining, produced worldwide at over 400 million tonnes a year.
Slag Wars: The Next Destroyer
Slag Wars: The Next Destroyer is a British queer reality competition seeking the next Cock Destroyer, hosted by Rebecca More and Sophie Anderson; two series, 2020 and 2024, with Matthew Camp and Fantasia Royale Gaga.
Slagters Nek Rebellion
The Slagters Nek Rebellion, also spelled Slachter's Nek, was an 1815 Boer rising against British authority in the eastern Cape Colony, ending with five rebels hanged in March 1816.
Slaine (rapper)
Slaine (George Carroll, born 1977) is a Boston hardcore rapper and actor, member of Special Teamz and La Coka Nostra, known for Gone Baby Gone and The Town, and cofounder of treatment centers including Grand Rising Behavioral Health.
Slakh2100
Slakh2100 is a dataset of 2,100 multi-track music recordings with aligned MIDI files, synthesized from the Lakh MIDI Dataset by MERL and Northwestern University for music source separation research.
Slalom skiing
Slalom skiing: the technical alpine ski racing discipline of tightly spaced gates, raced in two runs; invented by Arnold Lunn, Olympic since 1936, lowest injury rate of the four alpine disciplines.
Slam dunk
Slam dunk: a basketball shot forcing the ball downward through the 3.05 m rim; first recorded 1936 by Joe Fortenberry, banned in college 1967-1976, showcased in the NBA Slam Dunk Contest since 1984.
Slam Dunk (スラムダンク) (manga)
Slam Dunk (スラムダンク) is Takehiko Inoue's basketball manga serialized in Weekly Shonen Jump 1990–1996, 276 chapters in 31 volumes, over 185 million copies worldwide, adapted into anime and The First Slam Dunk film.
Slam Dunk Contest
The Slam Dunk Contest is an annual NBA All-Star Weekend competition featuring judged dunks, first held in 1976 and held by the NBA since 1984.
Slam Dunk: The Movie
Slam Dunk: The Movie (スラムダンク) is Toei Animation's first theatrical Slam Dunk film, released March 12, 1994. The 30-minute short, directed by Nobutaka Nishizawa, depicts Shohoku's practice match against Takezono High and Sakuragi's rivalry with Oda.
Slam Frank
Slam Frank is a satirical Off-Broadway musical by Andrew Fox and Joel Sinensky, inspired by a 2022 tweet about Anne Frank's white privilege, in which a progressive theater company stages The Diary of Anne Frank as an Afro-Latin hip-hop musical; it ran at Asylum NYC in 2025 and the Orpheum Theatre in 2026.
slam_toolbox
slam_toolbox is an open-source ROS and ROS 2 package for 2D laser-based SLAM, built by Steve Macenski and serving as the supported SLAM library for ROS 2's Nav2 navigation stack.
SLAM-seq
SLAM-seq is a metabolic RNA labeling method, reported in 2017, that measures transcript-specific RNA synthesis and decay by detecting 4-thiouridine incorporation as T-to-C conversions in sequencing data.
Slamet
Mount Slamet (Gunung Slamet) is a 3,428 m active basaltic stratovolcano in Central Java, Indonesia, on the Sunda Arc, with two overlapping edifices, about 35 flank cinder cones, a 2014 VEI 2 eruption, and Level II unrest since 2024.
Slamming (hydrodynamics)
Slamming in hydrodynamics is the violent impact between a liquid and a solid, classically a ship's hull reentering the water, with short, intense pressure peaks that can damage hulls.
Slammiversary (2025)
Slammiversary (2025) was TNA Wrestling's July 20, 2025 pay-per-view at UBS Arena, Elmont, New York, drawing a then-record 7,623 fans; Trick Williams retained the TNA World Title, Leon Slater became the youngest X Division Champion, and AJ Styles and Bully Ray returned.
Slammy Award
The Slammy Award, also known as the WWE Slammy Award, is an annual award presented by WWE to its own performers, matches, and moments since 1986.
Slamtec
Slamtec (Shanghai Slamtec Co., Ltd.) is a Chinese robotics company in Shanghai, founded in 2013 from the RoboPeak team, making low-cost RPLIDAR laser scanners for service robots.