When a person smiles and it looks like they have a single ball on their chin.
"hahahaha look at him smile! he has a ball chin!"
by bfmv_jewfin_25 January 24, 2010
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BALL CHIN-again...... when a mans balls bounce off ur chin AGAIN AND AGAIN AND .....again.
dennis Wants a ball chin-again....where his balls bounce off my chin again and again
by The ball buffer March 31, 2020
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