Bus Ass

A women that is very tall and has a flat ass.
Bob: Oh man, look at that bus ass.
Bill: Take one for the team Bob.
by TeHeLaugh January 20, 2008
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School Bus Ass

An ass so big that on a school bus it takes up the entire seat.
That bitch was so fat that she had a school bus ass!
by TBONESTEAKS April 13, 2011
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