Top Definition
Men who actively persue pregnant women. Often used as a mild insult without the true meaning being known.

Founded by J.R. and C.R.
Ex. 1
Mike: Is your new girlfriend fat?
Jim: No she is just pregnant.

Mike. You're a flo boy.

Ex 2.
Yeah im just chillen with my flo boys.
by Highland Lake July 07, 2013

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