When you have the bubble guts and tell your bitch to lick your asshole and shit in her mouth. Thus having dirty water on her melon.
Paul ate too much spaghetti and had a stomach ache, during copulation with Becky he asked her to lick his anus not knowing he was about to bust a Dirty Watermelon.
by Mr. Not_So_Nice_Guy July 18, 2017

a cute fluffy stuffed animal that is shaped like a watermelon, and is the kindest most amazing watermelon you will ever meet
by mernard tiddlebink April 18, 2021

by cufd May 14, 2021

The act of telling a story or joke that is so poorly worded or has no relevance to the topic at hand, thus making the social setting as awkward as a watermelon shark
"blaa blaa blaa... (bad story)... blaa blaa blaa"
"That was such a watermelon shark."
*makes shark movements with hands*
"That was such a watermelon shark."
*makes shark movements with hands*
by MelonShark January 19, 2010

by Watermelonsugarh1gh September 22, 2020

The title of Harry Styles popular song.... which is NOT about drugs, but, about aural sex. ‘Watermelon sugar high’ is in reference to an orgasm
by Sluttyyyy December 8, 2020

by harrystyles-tosses-salad January 16, 2020
