punk (Adjective) — Of very poor quality; flimsy.
punk (Noun) — A teenager or young adult who is a performer (or enthusiast) of punk rock and a member of the punk youth subculture.
punk (Noun) — Rock music with deliberately offensive lyrics expressing anger and social alienation; in part a reaction against progressive rock.
punk (Noun) — An aggressive and violent young criminal.
punk (Noun) — Substance that smolders when ignited; used to light fuses (especially fireworks).
punk (Noun) — Material for starting a fire.