Like motorboating but to a nut-sack instead. Putting your lips in between the testicles and blowing out of tight lips to make a motor boat sound while shaking your head.
Lisa: Did you see that sperm bank?
Sarah: Yeah. I wanted to nutterboat the hell out of it.
This napternoon, i had a dream that mrs. finklestein, sitting down to breakfast with her longtime butler and confidante, mr. fonzworth, tripped over her own feet and fell into the porridge bowl!!!!!