The act of cupping a hand around the bottom of ones butt cheeks while in the shower and allowing water to collect there, filling your crack. Once the crack is full of water the person performing the Iraqi Hot Tub then farts, which causes the fart to pass through the collected water thus making the water bubble and boil as in a Hot Tub.

The Iraqi Hot Tub also has a silencing effect on farts, making it a great way to sneakily let one rip in close proximity to others.

See also Iraqi Car Wash
I always perform the Iraqi Hot Tub while showering to muffle my farts, so my girlfriend can’t hear them in the other room.
by SoAngryRanger November 19, 2017
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