Take a warm bowl of milk, drop testicles into bowl, have girl take straw and blow bubbles in milk while executing a handjob.
She's so wild she gave me a French Motorboat...
by JFW April 30, 2004
a french motorboat takes place when a guy sticks his balls in a glass of milk and girl uses a straw to blow bubbles in the milk
Robert loves getting a french motorboat.
by Jackie Mother Fuckin' Jones August 01, 2003
While having a bowl of milk, dipping the male genitals into the bowl your partner then proceeds to blow bubbles in the milk bowl with a straw.
"Dude, I got a French Motor Boat ride last night. Whatchou know about that holmes."
by Al Dreiberg August 14, 2008