Slotorboat 

Motorboat, only slower and thereby more tender and romantic.

I was going to do the motorboat, but a love song came on, so I did the slotorboat like a gentleman.

Slotorboat by Chadimus Prime January 17, 2015

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

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

Scrotorboat

The male equivalent of motorboat

So I lifted his peen, and gave him a scrotorboat, that'll teach him for motorboating me!

Scrotorboat by stuffoo January 25, 2009

smotorboat 

Blowing your lips in between one's ass cheeks to make a boat propeller sound.

Sheeit, I would smotorboat that fox's badonkadonk till my lips fall off!

smotorboat by Don Schlong January 20, 2014