look up any word, like bukkake:
 
3.
(Verb) the act of having the scrotum gargled while receiving oral sex.
The fine lady with the blackberry was giving me terrible head last night. GOD bless her. But then she proceeded to scroter-boat me. It was a fucking game changer.
by Trap god September 19, 2013
 
1.
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.
by Capt. Scotty September 19, 2007
 
2.
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
by djnick33 August 27, 2007