Batmunk

Copious amounts of seminal fluid in the rectum during an anal gape.

Brad: Natasha and I were batmunking so hard last night.
Carl: I don't care, that's freaking gross.

by ReaCtioNz December 29, 2015

nutflap

The leftover skin of the scrotum after a man gets his testicles removed, so the "flap" of skin from the "nut"sack.

"So how did Jim's surgery go?"
"They couldn't save his balls because of the impact of all those fish, so they had to settle with the nutflap."

by ReaCtioNz December 24, 2014