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A number so large it can only be found on Urban Dictionary. Mass quantities. Lots of certain stuff. Represented by a 1 followed 461 billion zeros.
Moe: So, Joe. What are your plans for the weekend?

Joe: Why Moe, I'm gunna try to drink a thrillion beers by Sunday night.

Moe: Good luck, Joe. You're a true American hero!
by SurveyJake April 17, 2009
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A thrillingly large number of something, most often of something awesome (or thrilling, obviously).
'I went on the roller coaster a thrillion times!'

'I have a thrillion dates coming up'.
by mlle.vanille June 10, 2011
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