Top Definition
When a man has a serious girlfriend or wife and cheats on her with another woman. The other woman is desperate and a little chunky, but much less maintenance.
She thought he was in love with her and was going to leave his wife but then realized she was just chubby side action.
#side action #chubby action #chunky side action #fat side action #chunky on-the-side
by PMN February 23, 2006
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