Owlbow's def'n arrived first:

Bad definitions - I should be good at this.
(This doesn't count, because it's not caweful enough):
A guy with a special liking for former prisoners of war

This is my submission:
A very strong cigarette

then came max with a terse def'n, but a full etymology:

Cigarette. Welsh slang, from pwff puff, and ffagl flame, torch.

it was a daunting task to combine the two -- although I could have gone with Obie's first def'n, I suppose..