Greasy Monkeywrench

Using lotion during a handjob (see hj)
The penis represents a monkeywrench
Lotion represents grease
Thus a GREASY MONKEYWRENCH

Tommy:Dude last nite Lisa totaly gave me a Greasy Monkeywrench
Luis:Dude, I got one two nites ago
Tommy:Sweet dude
Luis:I know man