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The Period Baby is similar to a Food Baby, and occurs once a month when a woman has her period and bloats to a level where it appears she is pregnant. Note: this phenomenom is usually only observable in slender women (like a snake that just ate a rat). The more heavy set women can absorb the period baby without an observable bump (like an elephant that eats a peanut).
Lindsey: "I can't go out tonight in that half-shirt."

Paris: "Why?

Lindsey: "Look at my Period Baby!!!!"
by deepthoughts August 23, 2011
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