Top Definition
fuck me up the bum.
don't use this word unless you are allowed to use it, otherwise, a small group of people will come to your house and beat you.
Juliett says: i love you.
Sarah says: no.
Juliett says: wow sarah, fmutb.
Sarah says: bend over.
#fuck #me #up #the #bum
by fmutbwhore December 28, 2010
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