Birmingham belly-flop 

a derivative of the "Alabama jackhammer"; a standing "69" in which the woman is upside-down performing fellatio. Once the man senses the nearing of the orgasm he performs an Alabama jackhammer like maneuver in which he belly-flops (still in the 69 position) onto the bed/floor/table, etc., and slams his penis into the back of the woman's throat releasing a heap of semen into the bronchial tubes or esophagus of the woman

"The other day I was 69in'... but standin' up...and when I thought I was gonna cum I pulled a Birmingham belly-flop on my lady and she went "GAH!" and I went "nnnguuuuuuuuuh!!!"

Birmingham belly-flop by Dirty Cral Sully January 20, 2009

Mexican Belly Flop

When a Hispanic person (not necessarily Mexican) attempts to cross the border via Rio Grande and falls on their stomach into the river.

"Hey get that there Mexican, he's tryna cross... Oh... Never mind it don't matter no more... just another Mexican belly flop. I'll get 'em!

Mexican Belly Flop by lolokthatfunny November 15, 2009

Virgin belly flop

Falling vagina first while skimboarding.

Girl 1: You okay?
Girl 2: No!

Girl 1: What happened?
Girl 2: I fell flat on my cunt!
Girl 1: OHHH!! Virgin belly flop!!! OUCH!!

Virgin belly flop by grandpooba October 3, 2011

jick jack billy flop flack 

The ability to climb tall buildings with no assistance

Clayton can jick jack billy flop flack easily.

jick jack billy flop flack by TIlove February 11, 2009

Billy Flop 

When your friend Billy sucks at Fantasy Football and get his ass blown out every game.

Woooow Bill took a real Billy Flop this week in Fantasy Football.

Billy Flop by Dropping Digits September 28, 2025

Arabian Bellyflop

The act of when a man jerks off onto his stomach and then proceeds to belly flop onto his partner causing the cum to spaltter.

Man #1: “You wont guess what I did last night. My girlfriend let me do an Arabian bellyflop after we got back from dinner”

Man #2 “That’s awesome man”

Arabian Bellyflop by Guierrmo Geese’s January 14, 2019

bratwurst bellyflop 

When a man and a woman are performing the sex act of 69 with the man on top. The man, out of nowhere, does a bellyflop on top of the woman, therefore, thursting his dick down her throat and causing momentary choking

"So me and my girl were 69ing last night when all of a sudden i bratwurst bellyflopped her, she has had a sore throat ever since"

bratwurst bellyflop by andy zepher January 6, 2009