verb

• (transitive, now literary) To kill; to murder.
  "The knight slew the dragon."
• (transitive, literary) To eradicate or stamp out.
  "You must slay these thoughts."
• (transitive, by extension, hyperbolic, informal) To defeat; to overcome (in a competition or contest).
  "The Yankees were actually slayed by two former Yankees because Rich Gossage pitched one scoreless inning in relief of Eckersley to notch his first victory."
• (transitive, slang) To delight or overwhelm, especially with laughter.
  "Ha ha! You slay me!"

noun

• (chiefly African-American Vernacular and LGBTQ slang) Something excellent, amazing, or fashionable.
  "Equally effervescent was EmRata [Emily Ratajkowski] in 2001 Versace; meanwhile Zendaya, clothed in a 1996 John Galliano for Givenchy gown that could rival Queen Victoria’s regal mourning robes, was a slay for the ages."

intj

• (chiefly African-American Vernacular and LGBTQ slang) Used to express approval or amazement.
  "Despite its dismal performance at the box office, Jennifer’s Body has become a cult favourite – particularly amongst queer women. The horror-comedy stars Megan Fox as a cheerleader who becomes possessed by a succubus – a demon who seduces men, kills them and devours their flesh etc. Slay!"