F.U.I.H. stands for fuck you im high. Used in order to refuse a request of action or even movement; while also reasoning for being forgetful while under the effects of Marijuana.

**(usually used in digital communication such as Facebook, texting etc...)
(in text)
Person 1: Hey do you want to go to the store with me?
Person 2: F.U.I.H.
by Corey_danger August 13, 2011
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