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1.
A large and/or powerful moustache. A moustache to be feared.

bearers of the power 'stache include:

Jamie Hyneman
Yosemite Sam
Wilford Brimley
Sam Elliot
Tom Selleck
Dennis Gage from My Classic Car
Kurt Russel in Tombstone, now that's a power 'stache.
by Dr. Badwrench January 13, 2007