scroterboat 

Whilst manipulating the scrotum with your mouth, shake your head back and forth making a "motorboat" engine sound.
It's the male version of the motorboat.

Last night, Janine was circumnaviagting my scrote and then she went crazy and scroterboated me. I may now marry her.

scroterboat by Capt Scotty October 2, 2007

scroterboat 

v. int. The act of pushing one's face in between ones scrotum, and rocking one's head side to side very rapidly while making a vigorous, lip-vibrating "brrr" sound.

That chick gave me the best scroterboat ever. My balls are now numb

scroterboat by djnick33 September 3, 2007

Scroteration 

(Skro-tur-ay-shun)

1. A laceration on the scrotum most commonly caused by manscaping or rogue fly zippers.

Jill: Why do you keep grimacing when you sit down Jack?
Jack: I gave myself a scroteration last night
Jill: You gave yourself a what now?
Jack: FFS! I cut my ballbag shaving woman!

Scroteration by Mr W to the R to the C November 25, 2011

Scrotorboat

The act of motorboating applied to a scrotum.

"She scrotorboated me when she went down on me last night"

Scrotorboat by ShiftyJack November 25, 2009

Scroaterboat 

When one puts ones face in a scrotum and proceeds to motor boat

"So last night she's sucking my dick right then all of the sudden she scroaterboated me"

"I scroaterboated the fuck out of him last night"

Scroaterboat by Hairy Scroats May 6, 2013

scrotorboat

Verb: to motorboat someone's ball sac as though it were a woman's cleavage. Scrotorboating is not exclusive to the nuts, and can even include said activity on someone's taint.

"Please just go down on me. When you scrotorboat me, it tickles and I lose focus!"

scrotorboat by FeralBuddy October 13, 2011

scrotorboating

Pressing one's face into and around a man's testicles, and going "bbbbpppbpbpbpmmmbpbpbphhhphhphh"

Watch out man, she'll scrotorboat you.

Dude, I love scrotorboating. I go ever other Friday.

scrotorboating by sarbs December 21, 2013