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An inflated lower abdomen of a middle aged woman usually between the belly button and vagina. The number one condition causing guys to go from noon to six when looking at a potential "cougar."
Dude, did you see her milfyness?

Yeah, but she's got a nasty tuna bubble.
by Buttmonkeyflex September 07, 2009

Words related to tuna bubble

gut puff bubble puffy abs pussy tunabubble