dressed to kill in the DIY, punkrock style including but not limited to excessive safety pins, spiked hair, mohawks, chokers, patches, eyeliner, blood, etc.
to quit, esp. from fear; to chicken out or back down as from intimidation;
scared or frightened to act; back down from a confrontational situation because you are too afraid to act.
To back out of something you said you were going to do. No it doesn't mean backdown from a challenge or someone else that makes no sense. Backdown means to say no to something back out means you say u were gonna do something but then u dont do it. :/
punked out (synonym: herbed): Tyler and Kevin were gonna fight at the park after school but Tyler punked out and went home instead.