Also found in: Thesaurus, Idioms, Encyclopedia, Wikipedia.
A timid or unadventurous person: "the impression that he is a colorless, indecisive wimp, and not a leader among men" (James J. Kilpatrick).
intr.v. wimped, wimp·ing, wimps
To be timid or cowardly. Usually used with out: wimped out and refused to jump off the high diving board.
[Perhaps from whimper.]
Any of various hypothetical subatomic particles that interact with matter through gravity and the weak force and that are sometimes postulated to constitute a galaxy's missing mass.
[w(eakly) i(nteracting) m(assive) p(article).]