Top Definition
A troll who tries to impersonate a celebrity or other well known people. This can range from celebrities or just famous people amongst a small community.

These people are often just annoying, they also have a tendency to make fun of the celebrity they are impersonating.
ImposterTroll: Hello everyone I am Brad Pit and I would like to tell how much all of you suck!

Unit7: Crap another Imposter Troll. :(

Bradpitluver44: OMG ITS BRAD PIT! WOOT!! MARRY ME?!?

Imposter Troll: Sure, I would love to be the father of your first born.
by Unit7 May 11, 2009

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