From LXF Wiki

WIMP is an acronym for Windows, Icons, Menus and Pointers. A neat way of describing the graphical user interface (GUI) concepts developed at Xerox's Palo Alto research site. These central concepts were initially taken up by Apple in the original Mac, then by other computers.

If you thought it was a Weakly Interacting Massive Particle then you need a theoretical cosmology wiki and not a Linux one.