defenestration n. [mythically from a traditional Czech assassination method, via SF fandom] 1. Proper karmic retribution for an incorrigible punster. "Oh, ghod, that was awful!" "Quick! Defenestrate him!" 2. The act of throwing something or someone out of a window. 3. The act of discarding something under the assumption that it will improve matters. "I don't have any brain left." "Well, why don't you defenestrate that 100 megs worth of old core dumps?" 4. The act of completely removing Micro$oft Windows from a PC in favor of a better OS (typically Linux).