Top Definition
The stomach ache and subsequent bathroom incidents associated with being on, or being close to starting, your period. This can interfere with dates, meetings, and especially exercise. The connection between the uterus and bowels remains largely a mystery.
I want to go for a run, but I have period stomach and I don't want to poo my pants.
by shakalaka999 March 25, 2014
5 Words related to period stomach

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