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• wimp
  wimp

  noun

  a weak, ineffectual, timid person.
• WIMP
  WIMP

  noun

  any of a group of weakly interacting elementary particles predicted by various unified field theories, as the W particle and Z-zero particle, that are characterized by relatively large masses.

wimp

¹ American  

[wimp] / wɪmp /

noun

Informal.

1. a weak, ineffectual, timid person.

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verb phrase

1. wimp out

   1. to be or act like a wimp.

   2. to show timidity or cowardice; chicken out.

WIMP ² American  

[wimp] / wɪmp /

noun

1. any of a group of weakly interacting elementary particles predicted by various unified field theories, as the W particle and Z-zero particle, that are characterized by relatively large masses.

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wimp ¹ British  

/ wɪmp /

noun

1. informal a feeble ineffective person See also wimp out

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WIMP ² British  

/ wɪmp /

acronym

1. windows, icons, menus ( or mice), pointers: denoting a type of user-friendly screen display used on small computers

   a WIMP system

2. physics weakly interacting massive particle

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WIMP Scientific  

/ wĭmp /

1. Short for weakly interacting massive particle. Any of various hypothetical particles, some predicted by certain theories such as supersymmetry, which interact with other particles by the force of gravity alone. WIMPs are considered by some scientists to be candidates for the dark matter that makes up much of the mass of the universe.

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Other Word Forms

Derived Forms

• wimpish
  adjective

Etymology

Origin of wimp¹

An Americanism dating back to 1915–20; origin uncertain; cf. whimper

Origin of WIMP²

1985–90; W(eakly) I(nteracting) M(assive) P(article)

Explanation

A wimp is someone who's fearful or weak. If you don't want to ride the roller coaster, you don't have to — don't let yourself be talked into it just because you're worried your friends will call you a wimp. Wimp is an informal, derogatory way to refer to someone who's nervous or unadventurous, like calling them a "chicken" or "crybaby." And when you wimp out, you don't follow through on something because you're too scared: "I didn't mean to wimp out, but when I got up there, I changed my mind about bungee jumping." Experts aren't sure about the origin of wimp but think it may be connected to whimper, "cry softly and fearfully."

Example Sentences

Stripped of his invulnerability, Homelander wilts into a bawling wimp, begging for his life on his knees.

From Salon • May 24, 2026

Tell me you’re not a wimp without telling me you’re not a wimp.

From Los Angeles Times • Jul. 24, 2025

"So, either she's going to be a wimp, and do nothing, or she's going to be driven and ambitious. Character is what drives everything forward."

From BBC • Nov. 25, 2024

It’s a tough assignment for a self-described wimp who ceaselessly cites his own shortcomings: bad grades, a flabby torso, a smarmy personality.

From Seattle Times • Jul. 20, 2023

It was why she rarely let Furball out of her sight and why the dog was such a wimp.

From "The House of the Scorpion" by Nancy Farmer

Related Words

• coward
• crybaby
• pushover