flop

(noun) an arithmetic operation performed on floating-point numbers. Synonyms: floating-point operation. Examples: "This computer can perform a million flops per second."

(noun) someone who is unsuccessful. Synonyms: dud, washout.

(noun) a complete failure. Synonyms: bust, fizzle. Examples: "The play was a dismal flop."

(noun) the act of throwing yourself down. Synonyms: collapse. Examples: "He landed on the bed with a great flop."

(verb) fall loosely. Examples: "He flopped into a chair."

(verb) fall suddenly and abruptly.

(verb) fail utterly; collapse. Synonyms: fall through, fall flat, founder. Examples: "The project foundered."

(adv) with a flopping sound. Examples: "He tumbled flop into the mud."

(adv) exactly. Synonyms: right. Examples: "He fell flop on his face."