1. The state of complete awe and fangirl/boying at which it becomes difficult to function normally in the presence of Cumberbatch (even if his presence is merely the organisation of pixels on a screen.)
2. Also refers to a something which sucked before, but, by having an association with him, becomes inherently more awesome.
Cumberbitch 2: YOU'VE BEEN CUMBERBATCHED.
From the actor Benedict Cumberbatch from the British tv show 'Sherlock'