When you perform anal penetration on a man/woman (whatever floats your boat), pull out just before orgasm and ejaculate in their oral cavity, followed by urinating in the previously mentioned orifice.
Tyrone: "Yo my nignog, this girl was so hot last night I had to put her out with a dirty fire hydrant''
DeShawn: "I wish you'd do that shit to me brotha"
DeShawn: "I wish you'd do that shit to me brotha"
by Boat People May 9, 2017
Get the dirty fire hydrantmug.