Nouns

(n)floating-point operation, flopan arithmetic operation performed on floating-point numbers“this computer can perform a million flops per second”
(n)flop, dud, washoutsomeone who is unsuccessful
(n)flop, bust, fizzlea complete failure“the play was a dismal flop”
(n)flop, collapsethe act of throwing yourself down; collapse; sink“he landed on the bed with a great flop”

Verbs

(v)flopfall loosely“He flopped into a chair”
(v)flopfall suddenly and abruptly
(v)fall through, fall flat, founder, flopfail utterly; collapse“The project foundered”

Adverbs

(r)flopwith a flopping sound“he tumbled flop into the mud”
(r)right, flopin a face down manner“he fell flop on his face”