When you don't want others in a public restroom to hear your explosive diarrhea. You pucker up and you flush the toilet at the same time while you dump everything you've got. The toilet flush tries to cover your ass blast noise. Also gets rid of some lingering diarrhea smells.
Girl 1: Honey, I had to dump so bad but the bathroom was full and I didn't want to be embarrassed so I had to pull a Flash Flood Dump.
Girl 2: Dang I know what you meanhun, last time I did that the toilet cut off before I could stop. It was embarrassing. :/
Differing from a shit and split, a flush and dump is often done out of consideration, or due to turd insecurity.
The action involves expelling a turd at the same time one hits the flush lever on a toilet.
This is done to mask a noisy turd in a public restroom or to quickly get rid of a smelly turd before it renders a bathroom uninhabitable.
Since it was his first time at her house, Andrew courteously performed a flush and dump in Martha's bathroom, vastly improving his chances of scoring that night.
Someone who is heavily hated and regarded as not being worthy enough to be acknowledged as a person through their actions. Such a term only applies to people who have done moral wrongs, and cannot be applied to those you simply loathe.
Friend 1: Did you hear about the YouTuber PocketbookPhilosophy and how he exposed Sketch?
Friend 2: Yeah, what a goddamn fleshlump.