Person you would like to beat up.. stands for person i would like to fuck up. when sum1 gets on ur nerves n u talkn bout them You jus call them a Piwltfu.. it is said like Piltu
Greg: Dude ward is that (zachy lol just gotta put that in there) kid a Piwltfu?
Fucking Huge ass Hippo that lives in the amazon that eats alligators, Fish, monkeys, or anything it can get its hands on. Also can use as an insult to someone who is very large.