(i) According to Time Magazine (and Wikipedia) he's the greatest Physicist in the world at this point. Instrumental in developing string theory and known for his planet sized brain.
(ii) Synonym for a dumbass
Dude, how did you figure out how to get Christie's Number?
I asked Ed Witten, he figured it out.
Nice work Ed Witten! Now my car smells of ten day old guacamole and burritos.