Top definition
The act of ejaculating a lot uncontrollably during intercourse. The semen covers the partners entire body as if they are "swimming" in semen.

"I was fucking my wife last night and there was so much semen we let it swim."

(during intercourse)
Man: "Ohhh there's so much semen!!!"

Woman: "Just let it swim hun"
booty semen sex penis vagina let it swim
by TheRev31415 March 08, 2014
Get the mug
Get a let it swim mug for your father-in-law Abdul.