to move up and down or back and forth quickly, a piece of material attached at one edge, used to cover or close something

have a flap, flip one's flapjacks, flap one's gums

Formal and Informal Expressions of flap

In different contexts, you can replace 'flap' with suitable alternatives. In a more formal setting, 'oscillate, undulate' is apt. In informal speech or writing, 'waggle, shake' is a commonplace synonym.

flap: Explore its Definition & Usage

flap Definition

1to move up and down or back and forth quickly
2a piece of material attached at one edge, used to cover or close something

Using flap: Examples

Take a moment to familiarize yourself with how "flap" can be used in various situations through the following examples!

Example
The bird's wings flapped as it took off.
Example
She flapped the towel to get rid of the dust.
Example
The tent flap was open, letting in the cold air.
Example
The butterfly flapped its wings slowly.

flap Synonyms and Antonyms

Synonyms for flap

Antonyms for flap

Phrases with flap

have a flap
to be worried or anxious about something
Example
I'm having a flap about my exam tomorrow.
flip one's flapjacks
to lose one's temper or composure
Example
He flipped his flapjacks when he saw the mess in the kitchen.
flap one's gums
to talk excessively or idly
Example
He's always flapping his gums about nothing important.

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Summary: flap in Brief

The term 'flap' [flæp] can be used as a verb or a noun. As a verb, it means to move up and down or back and forth quickly. As a noun, it refers to a piece of material attached at one edge, used to cover or close something. Examples include 'The bird's wings flapped as it took off.' and 'The tent flap was open, letting in the cold air.' 'Flap' also has idiomatic uses such as 'have a flap,' meaning to be worried or anxious about something.