Top Definition
Cute way of saying "Baby", often expressed to your Lover.
"Hey Chunky butt, How are you?"
"Who's my chunky butt?, Yes you are"
by Felix Santos May 08, 2008
A girl who has a little weight on her but not enough to call her fat.
That girl isn't big, she's more of a chunky butt.
by TheMightyMos December 16, 2008

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