Meaning of FLOP in English

I. ˈfläp verb

( flopped ; flop·ping )

Etymology: alteration of flap (II)

Date: 1602

intransitive verb

1. : to swing or move loosely : flap

2. : to throw or move oneself in a heavy, clumsy, or relaxed manner

flopped into the chair

3. : to change or turn suddenly

4. : to go to bed

a place to flop at night

5. : to fail completely

the play flopped

transitive verb

: to move or drop heavily or noisily : cause to flop

flopped the bundles down

• flop·per noun

II. adverb

Date: 1728

: right , squarely

fell flop on my face

III. noun

Date: 1823

1. : an act or sound of flopping

2. : a complete failure

the movie was a flop

3. slang : a place to sleep ; especially : flophouse

4. : dung

cow flop

also : a piece of dung

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.