"to plop one out" is slang for "to give birth." it is often used when making fun of the birth-giving process.
Pa, I just plopped another one out? Where can I put it?
SUE ANN, HOW MANY TIMES DID I TELL YOU NOT TO PLOP ONE OUT WHEN COMPANY IS OVER?
SUE ANN, HOW MANY TIMES DID I TELL YOU NOT TO PLOP ONE OUT WHEN COMPANY IS OVER?
by Mofo Egg Salad November 16, 2006