Ol' Faithful 

When a Mentos is inserted deeply into his/her butthole and Coke is poured over it causing a small eruption of brown juice.

My butthole hasn't seen action in quite a while! I could sure go for an Ol' Faithful to cure the urge.

Ol' Faithful by Roman Chambers September 22, 2010

Old Faithful 

A ex-girlfriend or girl you can always depend on for sex when your feeling lonely.

Jimmy: Hey man I just got turned down by that hot girl at the club.
Bobby: No problem man, just call up your old faithful.
Jimmy: I didnt want to resort to that but sure, I really need some sex.

Old Faithful by daGangst4man October 22, 2008

Old Faithful 

n.

1. The act of flatulating under the covers while in bed and spitting in the air so your significant other has to cover his or her face. Thus forcing them to bask in the ambiance. A variation of the dutch oven, just more sinister.

Footnote:
The victim of the Old Faithful is forced to choose between the lesser of the two evils: saliva or methane. It's win/win and %100 percent effective. Hence Old Faithful.

Last night my wife was complaining about me never talking to her after we have sex. So, I took a deep breath, let one slide, and gave her an Old Faithful. Needless to say we're separated now, but she had it coming.

Old Faithful by jason "jewboy" tracy July 14, 2008

being faithful 

Being faithful to a friend mean show them respect doin want they want when u don't want to as well let them do the same for you faithful is being generous to another kind sweet

loyal and loving....

I'm always being faithful to you

being faithful by Wussgudd🖕🏾 May 21, 2016

The old faithful 

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.

neil gave that bitch the old faithful last night.

The old faithful by Ben Paxton September 27, 2007

Old Faithful 

Named after the famous geyser in Yellowstone National Park, this is a schlong that spontaneously erupts and unleashes a cum geyser right into your girl's face when you pull your dick out of her mouth.

...And boy, was SHE surprised when she got sprayed in the face by Old Faithful!

Old Faithful by Mansnake February 11, 2005

Old Faithful 

this is when the male ejaculates in or onto the anus of a female, she then farts and the jizz shoots up into the air, resembling the geyser, old faithful.

Jose: I got bored last night so i gave Jen the Old Faithful

Mike: Nice, ill test it out on Brittany

Old Faithful by Jack10392 May 6, 2010