flop

US /flɑːp/
UK /flɑːp/
"flop" picture
1.

a complete failure

:
The movie was a complete flop at the box office.
His business venture turned out to be a big flop.
1.

to fall, drop, or hang loosely and heavily

:
He let his head flop onto the pillow.
The fish flopped around on the deck.
2.

to fail completely; be a flop

:
The play flopped on opening night.
Their new product launch flopped badly.