noun

• (toy) A small amount of percussive explosive in a paper strip or plastic cup for use in a toy gun.
  "Billy spent all morning firing caps with his friends, re-enacting storming the beach at Normandy."
• (slang) A bullet used to shoot someone.
  "Did he think they were going to put a cap in his ass right in the middle of Metreon?"
• (slang, originally African-American Vernacular) A lie or exaggeration.
  "no cap"
• (sports) A place on a national team; an international appearance.
  "Rio Ferdinand won his 50th cap for England in a game against Sweden."

verb

• (transitive) To cover or seal with a cap.
• (transitive) To award a cap as a mark of distinction.
• (transitive) To lie over or on top of something.
• (transitive) To surpass or outdo.

noun

• (finance) Capitalization.
• (informal) A capital letter.
• (electronics) A capacitor.
  "parasitic caps"
• (colloquial) Clipping of capture; a recording or screenshot.
  "Anyone have a cap of the games last night?"

verb

• (transitive, informal) To convert text to uppercase.
• (transitive) To take a screenshot or to record a copy of a video.
  "I've capped in VCD format, so will eventually post it to abme (I've since found out that it's a bit OT for this group)"
• (transitive, video games) To capture an objective, such as a flag or checkpoint.
  "Call your friends and bring a gun / The Halo revolution's on / Capping flags and arming bombs / Yes, we don't blink until we're done"
• (transitive, intransitive, video games) To capitulate (cause to capitulate) an opponent.