1. The simple act of masturbation

2. Masturbation performed underwater or where there may be large amounts of water, ex: an aquarium
"Sorry dude, I can't play ball right now. I have a serious urge to man the dolphin."

"Greg, look! Skeeter's manning the dolphin!"
by MunkySantaKlaus September 14, 2009
Get the man the dolphin mug.