An un-rude versoin of the phrase Fuck You. It can be used in many different places where 'fuck you' wouldn't be accepted, e.g. school, work, public places etc.
Rob:Haha I totally got you!
Ben: Oh Foo You Rob. Foo You.
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what you say to someone who you think is on sherm
Guy: "Ur a stupi an ugli"
Guy 2: "foo is you on sherm"
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