Spitting on your penis and putting it in another persons ear.
You will not believe what just happened, Dave gave Jan a Willy Pete!
Willy Pete is military jargon for white phosphorous. It has now become a popular term among teenagers since it's use as the name for a smoke grenade in Call of Duty: Black Ops.
Also, two names for a man's manhood.
Wow, he just nailed her with his Willy Pete!
(That example works for both uses of the term. Just to clarify.)
"OMG! Me and Kris we're trying some new things out last night and he gave me a Willy Pete! I was so pissed! But i kinda got a contact high
The act of shitting in anothers mouth, then them returning the favor by putting it back inside your ass via AssToMouth
I got a Willy Pete from Robbie Ransom last night