A swamp geyser is the act of filling someone's bellybutton full of piss,and semen. Then turning around to shart it all into their face.
Timothy:Bro what happened to your face ?
Shawn: oh, Marge gave me a swamp geyser last night but I haven't been able to clean it all off yet.
Shawn: oh, Marge gave me a swamp geyser last night but I haven't been able to clean it all off yet.
by Bert's berd February 18, 2022
Get the swamp geyser mug.