Top Definition
The phenomenon in film of swapping out the stagnated, boring Michael Cera for the slightly less stagnated, boring Jesse Eisenberg.
Q: Did you see Michael Cera in Zombieland? He definitely picked up another emotion besides adorable kerfuffledness! And I didn't feel the urge to cry out of confusion when he got the girl!

A: That wasn't Michael Cera. The casting director wisely performed the Eisenberg Switch.
by Chet Billingsdale September 14, 2010
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