a measure of computer speed, equal to the number of floating-point operations the computer can perform per second (used especially in combination with mega-, giga-, tera-).

Origin of flops

1985–90; fl(oating-point) op(erations per) s(econd)



verb (used without object), flopped, flop·ping.

to fall or plump down suddenly, especially with noise; drop or turn with a sudden bump or thud (sometimes followed by down): The puppy flopped down on the couch.
to change suddenly, as from one side or party to another (often followed by over).
to be a complete failure; fail: The play flopped dismally.
Informal. to sleep or be lodged: to flop at a friend's house.
to swing loosely; bounce; flap: His long hair flops in his eyes when he runs.

verb (used with object), flopped, flop·ping.

to drop with a sudden bump or thud: He flopped his books on a chair.
to dispose (oneself) in a heavily negligent manner: to flop oneself in a chair.
to invert (the negative of a photograph) so that the right and left sides are transposed.


an act of flopping.
the sound of flopping; a thud.
a failure: The new comedy was a flop.
Informal. a place to sleep; temporary lodging: The mission offered a flop and a free breakfast.

Origin of flop

1595–1605; 1890–95 for def 11; variant of flap
Related formsflop·per, noun

Synonyms for flop

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for flops

Contemporary Examples of flops

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British Dictionary definitions for flops



n acronym for

floating-point operations per second: used as a measure of computer processing power (in combination with a prefix)megaflops; gigaflops


verb flops, flopping or flopped

(intr) to bend, fall, or collapse loosely or carelesslyhis head flopped backwards
(when intr, often foll by into, onto, etc) to fall, cause to fall, or move with a sudden noisethe books flopped onto the floor
(intr) informal to fail; be unsuccessfulthe scheme flopped
(intr) to fall flat onto the surface of water, hitting it with the front of the body
(intr often foll by out) slang to go to sleep


the act of flopping
informal a complete failure
US and Canadian slang a place to sleep
athletics See Fosbury flop
the flop poker the first three community cards dealt face-up in a round of any of several varieties of poker, including Texas hold 'em

Word Origin for flop

C17: variant of flap
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for flops



1823, in the literal sense, from flop (v.). Figurative use by 1893.



c.1600, probably a variant of flap with a duller, heavier sound. Sense of "fall or drop heavily" is 1836, that of "collapse, fail" is 1919; though the figurative noun sense of "a failure" is recorded from 1893. Related: Flopped; flopping.

Online Etymology Dictionary, © 2010 Douglas Harper