A word used when you're expression anger towards something or someone who's being a douche. It's also a great way to win at scrabble.
1. You crazy kids get off my lawn. You lousy bunch of FUCKUNTAILS!
2. *puts on Napoleon Dynimite face* GAWD! Why're you such a fuckuntail?!
3.. Yes! 68 points! f-u-c-k-u-n-t-a-i-l!!! :D