When a girl is deep throating you and you pass out, falling on top of her and choking her in the process.
"I didn't mind that he dirty flashed me, it was the headbutt in the cunt that really blew the mood"
by Big G - Unity April 7, 2021
Get the dirty flash mug.
A term used in the custom Android ROM community that refers to flashing or installing a ROM without wiping user data.

Usually only possible if upgrading to a newer version of the same ROM.
The dev said dirty flash was okay, so I don't have to wipe my user data.
by KinteLiX August 29, 2022
Get the Dirty flash mug.