wimp

Noun
  1. A person who lacks confidence, is irresolute and wishy-washy (synset 110801493)
    is a type of: doormat, weakling, wuss - a person who is physically weak and ineffectual
    same as: chicken, crybaby
  2. A hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation;
    Postulated as a constituent of the dark matter of the universe (synset 109499847)
    referred to in: natural philosophy, physics - the science of matter and energy and their interactions
    domain usage: acronym, initialism - a word formed from the initial letters of the several words in the name and pronounced as one word
    is a type of: elementary particle, fundamental particle - (physics) a particle that is less complex than an atom; regarded as constituents of all matter
    is a part of: dark matter - (cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force
    same as: weakly interacting massive particle

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