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1.
A term used as an obvious substitute for any noun, verb, or adjective.

Man, that dude has a giant Blirm.
by Jawknee January 15, 2009
 
2.
A simulcast of a London production, esp. of Frankenstein, or some other classic tale of gothic horror.
She: I'm leaving at 5 a.m. tomorrow on a trip to Grass Valley to see a simulcast of the London production of Frankenstein.

He: That's getting up pretty early, just to catch a blirm. Wow. You must be some nerd.
by Clamtacular April 09, 2011