A vagina. When a woman's vagina becomes so warped from childbirth that subsequent babies come out like they are riding a log flume.
After the first couple of children Michelle Duggar's vagina had become a baby flume.
by DWMUND November 28, 2010
1 more definition
a low pitched noise of the throat, commonly creates a scene of chaos, uncomfortability, or ease.
Franky baby flumed so loud and hard that the room went silent... then erupted into full blown applause.
by sandycohen01 May 26, 2010