IPU

An abbreviation for Invisible Pink Unicorn, common in Internet discussion fora.

Faith tells us that the IPU is pink. Logic tells us that the IPU is invisible, since we cannot see Her.

by Doctor Whom May 25, 2005

IPU

Literally: I Pwn U
Meaning that the one who says it is pointing out that they are better than the other.

Fred: 2+2=5!
Ted: 2+2=4! IPU!

by Thoor Tayret September 20, 2009

Ipu

"I promise yu"

"Ipu always wanna do something to git on my nerves"

by Beautyandthebo1 February 27, 2017