wimp wimp /ˈwɪmp/

noun

1. A person who lacks confidence, is irresolute and wishy-washy  ( chicken [Informal] , crybaby [Informal] , wimp , candy-ass [Informal, N. American] , yellow-belly )
   a person who lacks confidence, is irresolute and wishy-washy
   

 WIMP

1. (physics) 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  ( weakly interacting massive particle , WIMP )
   (physics) 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