(n.) Former Democratic U.S. Senator (1986 to 2004) from South Dakota and former U.S. Senate Majority Leader who while holding the Minority Leader position lost reelection to first-time senator John Thune (R).
(n.) Any person who holds a position of seniority and/or power and is defeated or usurped by someone of substantially less power/influence.
(v.) To unseat a person of power as described above. (also 'daschle')
person 1: "I can't believe he got beat by that n00b! He's such a Tom Daschle."
person 2: "Yeah, he totally got daschled!"