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 23, 2005
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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 21, 2009
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"Ipu always wanna do something to git on my nerves"
by Beautyandthebo1 February 28, 2017
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