2 definitions by Serena Peterson

Top Definition
the process of one's butt getting bigger just by standing beside those with bigger butts.
People with fat friends get bigger butts just by being around "fat asses"
Julie's butt got bigger every time she was near Jane because of assmosis.
I can't help that my ass has gotten bigger; it was assmosis.
by Serena Peterson November 28, 2007
the process of one's butt getting bigger just by standing beside those with bigger butts.
People with fat friends get bigger butts just by being around "fat asses"
Julie's butt got bigger every time she was near Jane because of assmosis.
I can't help that my ass has gotten bigger; it was assmosis.
by Serena Peterson October 02, 2007
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