Top Definition

That fat roll that begins to develop on your girlfriend's tummy, which coincides with how much she bitches at you. For most girls, bitchfat is absorbed back into the body upon breakup, almost instantly, laying in wait for the next victim.. er.. boyfriend.
- Kevin never comes out with us any more. What's up with him?

- You ain't seen Theresa lately?

- No, why?

- Ah. Take a look, she's over there -

- What the...? She used to be all tiny and sweet... No wonder we don't see Kevin any more. She's got the bitchfat goin' on, don't she?

- ... aaaaand circle gets a square.
by yourtruck March 24, 2014
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