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1.
A foup is just what it sounds like. It is not a substitution for the so called great "F" word. It is a homage to the everlasting awesomeness of everything. Foup may be used in context and out of context. It is also a word that becomes one with the OM.
"You foup."

"I will be foup"
"What the foup is that stuff?" -Ben
"Oh, you know just some foup." -Stiller
by huguenot July 15, 2012
 
2.
Abbreviation for Fat Of Upper Pussy.
"Wow, look at the gross foup hanging off of that chick!"
by electric blue November 07, 2002
 
3.
to eat alot

to be chubby
Wow, i just foup'd

I am such a foup.
by FOUUUUUP September 24, 2008