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Someone who has absoulutely no control of their liquour, and Frequently goes on drunken tirades. Wreaking havoc on anyone or thing in his path. Usually of Native American descent.
Damn, Thunderbear went off last night and broke my lamp
by mike April 12, 2004
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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A strong, powerful and cunning bear that intimidates enemies by making stomping sounds emulating a herd of mama moose.
I was scared because I thought I was gettting chased by a mama moose, but it was just a thunderbear.
by Imeanreally? March 10, 2018
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A team of epic proportions, big and brawny and bring the thunder at every opportunity. Lightning fast and a powerhouse that cant be stopped. A charging thunderbear is a force to be reckoned with. You do not want to face off against a Thunderbear. Usually seen in the Pacific Northwest
We got ran over by the Thunderbears. The Thunderbears\ are unstoppable. Mommy please dont make me play, I have no chance against the Thunderbears.
by JW_rox February 16, 2018
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