The act off nutting (ejaculating) inside someone's mouth while they are on their back then stomping on their stomach. Those wearing a Used Poncho can avoid the geyser's angry eruption.
My girlfriend took one in the mouth from me last night so I stomped on her stomach, thus completing the Old Faithful. Wish I would've had a used poncho on...
by Brettford January 7, 2013
Get the Old Faithfulmug. When you place a heaping amount of cocaine on a girl's butthole and do a bump. Must be done quickly before geyser explodes sending flakes everywhere.
by Rustavo Moussego May 17, 2010
Get the Old Faithfulmug. right before your about to nut put it in her mouth blow it in pull it out and punch her in the stomach to make her spu the semen into the air closely ressembling Old Faithful.
by Rubsky April 19, 2006
Get the Old Faithfulmug. The action that occurs when a male receives a blow job, then just before reaching orgasm the subject performing the blow job punches the recipient in the stomach, causing violent eruption of bodily fluids and substances from all orifices simultaneously.
The night was off to a good start up until Sally initiated Old Faithful, causing the night to come to a screeching halt.
by sparkyshark July 29, 2008
Get the Old Faithfulmug. when a male ejaculates into their partners belly-button crevice and proceeds to punch them in the sides and making the man-juice shoot up like a geyser.
by Ben Paxton September 27, 2007
Get the The old faithfulmug. When you’re riding a guy’s cock and you squirt so hard that you force his dick out of you with the ensuing gush.
I was riding him like a pony when he made me have an old faithful and I launched myself right off his dick.
by Taz’sgirl November 14, 2019
Get the Old Faithfulmug. When you’re asspumping a dirty tramp face down on your mattress and feel like it’s that time time of day. Your dick hurts and it’s time to take a piss. With your Johnson stuck deep in her rectal cavity, you strike a firm blow to the back of her head in order to make her ass tighten up so there’s no way out of it for this bitch, then proceed to leak in said area until you feel the tank is properly full. As she screams in disbelief, swiftly remove your genitalia from the region. This should produce a large eruption of your unloaded piss which exits the asshole with astounding velocity, mimicking the famous geyser located in Yellowstone, Wyoming.
Her: What the fuck, did you just piss in my ass?!
You: (Whips out phone) Holy shit it’s old faithful!!
You: (Whips out phone) Holy shit it’s old faithful!!
by JJbangs124 June 27, 2020
Get the Old Faithfulmug.