A person who is your friend, but at the same time, is your worst enemy (as Lex Luthor is to Clark Kent of 'Superman' and 'Smallville' fame).
I love Kathy but she's such a lexluthor.
by Jim November 25, 2004
the arch-enemy of superman soon to be featured by kevin spacey
This is how it ends for the greatest criminal mind of our time. Not with a whimper, not with a bang. How do they choose to reward Lex Luthor, the greatest genius in this world? Do they give him glory? Do they give him treasure? What matter fact do they give him? Life plus twenty, Luthor! Get to work.
by slothics January 7, 2005
1.Bald Archenemy of Superman. Bald Industrialist, super villain and Mad Scientist.
2.Ruler of Australia
1.(In his own wordfs) Hi, everybody! The name's Luthor, Lex Luthor/lexluthor. Possibly you've heard the name: the Greatest Criminal Mind Of All Time!
2. General Zod: Lex Luthor/lexluthor, ruler of Australia... activate the machine.
by banky123 July 20, 2006