Top definition
a way of expressing a disbelief.
like "my ass"
girl: he ate a big piece of my pie

boy: my butt, it was a small piece
by el mago November 14, 2007
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2
disbelief, lie, something that you think is not true
im early right?

my butt your early, your an hour late.
by el mago November 14, 2007
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