Pontoon Boat
A motorboat, but in between the butt cheeks instead of the boobs.
Did you see Jack Pontoon Boat that stripper last night? He got his face right up in those butt cheeks.
Pontoon Boating
Similar to Motor Boating, but accomplished by placing your face in the other persons' ass cheeks instead of their breasts.
My mouth tastes like shit today because I was up all night pontoon boating this girl I met at Starbucks.
Pontoon Boat
A boat that old people usually drive.
I just saw a Pontoon Boat! I bet that an old person is driving it!