A dance move, used by Max George (the Wanted), usually paired with a blank facial expression. In essence, the move is to stand on your head and flip over onto your stomach.
A term used on "SpongeBob - Grandma's Kisses (bad)" on YouTube when SpongeBob gets upset at the Krusty Krab.
Can also be used as an insult. Usually said in an over-exaggerated yell.
SpongeBob: My dick...is sad. Because you made me mad, you floppy fish you!
Random Fish: FUCKIN FLOPPY FISH?! YOU'RE A FUCKING ASSBANG YOU FUCKING SHITHEAD!
Person 1: Hey, shut up!
Person 2: DON'T TELL ME HOW TO LIVE MY LIFE YOU FLOPPY FISH YOU!