Definition of "Punk" :

noun: rock music with deliberately offensive lyrics expressing anger and social alienation; in part a reaction against progressive rock

noun: an aggressive and violent young criminal

noun: a teenager or young adult who is a performer (or enthusiast) of punk rock and a member of the punk youth subculture

noun: material for starting a fire

noun: substance that smolders when ignited; used to light fuses (especially fireworks)

adjective: of very poor quality; flimsy