(transitive, intransitive) To use a pump to move (liquid or gas). / (transitive, often followed by up) To fill with air. / (transitive) To move rhythmically, as the motion of a pump.

(Britain) A low-top shoe with a rubber sole and a canvas upper; A gym shoe; A plimsoll; A low-top canvas sneaker.

(law, military) Inflicting punishment; punishing.

(informal) A game in which the first player to call "Punch buggy!" on sighting a Volkswagen Beetle gets to punch the other.

(now historical and rare) Synonym of prostitute: a person paid for sex. / (LGBT, obsolete) Synonym of catamite: a boy or younger man used by an older as a (usually passive) homosexual partner.

Bad, substandard. / Thuggish, criminal. / (chiefly African-American Vernacular) Cowardly. / Poorly, sickly. / Inexperienced. / Of or concerning punk rock or its associated subculture.

To pimp. / To forcibly perform anal sex upon an unwilling partner. / To prank. / (especially with "out") To give up or concede; to act like a wimp.

(uncountable) Any material used as tinder for lighting fires, such as agaric, dried wood, or touchwood, but especially wood altered by certain fungi.

Any of the punk genres: dieselpunk, solarpunk, steampunk etc.

(idiomatic) To begin an enterprise or recover from a setback without any outside help; to succeed only by one's own efforts or abilities.