Exactly the same as fuck you, but with F and Y swapped.
A: "Hey there, you look stupid today!"
B: "Yuck fou!"
by minicookies_with_sessions January 3, 2010
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why are you looking this up? you must be friggin' stupid if you can't figure out what it means.
yuck fou idiot!!!
what you dont know what it means?
not knowing what it means = idiot
by kung fu karl August 20, 2005
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