flop
adverb(flop)
exactly
Examples:
He fell flop on his face. 
flop
verb(flop)
fail utterly; collapse
Synonyms: fall flat, fall through, 
founder, 
 flop
noun(flop)
someone who is unsuccessful
flop
noun(flop)
a complete failure
Examples:
The play was a dismal flop. 
flop
noun(flop)
the act of throwing yourself down
Examples:
He landed on the bed with a great flop. 
flop
noun(flop)
an arithmetic operation performed on floating-point numbers
Synonyms: floating-point operation, 
Examples:
This computer can perform a million flops per second. 
flop
verb(flop)
fall loosely
Examples:
He flopped into a chair. 
flop
verb(flop)
fall suddenly and abruptly