noun
A device or person that applies caps, as to bullets or bottles.
A person that makes or sells caps.
A finale; something that is conclusively better, or "caps it all off".
(US, slang, dated) A by-bidder; a decoy for gamblers.
noun
(Internet slang) A person who records a television broadcast to their computer.
noun
(slang) A person who caps i.e. is inclined to untruth, a fibber.