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
A sexual act. It is when you pour an entire bottle of lube into a girls ass. Then, upon the first thrust, the lube sprays out like a geyser.
by AsevenX88 August 13, 2011
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
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 March 24, 2006
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 December 12, 2005
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
I was in the bathroom after I took a shit. My old lady came in and gave me an Old Faithful while I was in the bidet.
by Ye Ol Faithful October 14, 2023