Source : WordNet®

wimp
     n 1: a person who lacks confidence, is irresolute and wishy-washy
          [syn: {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 [syn: {weakly interacting massive particle}]

Source : Free On-Line Dictionary of Computing

WIMP
     
         Windows, Icons, Menus and Pointers
        (or maybe Windows, Icons, Mouse, {Pull-down menu}s).
     
        The style of {graphical user interface} invented at {Xerox
        PARC}, popularised by the {Apple Macintosh} and now available
        in other varieties such as the {X Window System},
        {OSF}/{Motif}, {NeWS} and {RISC OS}.
     
        See {menuitis}, {user-obsequious}, {window system}.
     
        (1995-05-02)