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1.
1. a bear suit, outfit or costume.
2. A spazz band from Norwich whom enjoy dressing up as bears.
bearsuits will take over the world!
by colly October 23, 2003
 
2.
The pj's that a mans wife or girlfriend wears to bed if she doesn't want to have sex. Like an all flannel outfit or fat pants.
Husband says to him self, " I can see the wife has her bearsuit on again. Looks like more masterbating for me tonight."
by Alfred Blowbaum January 21, 2014
 
3.
To get angry all of a sudden, often scaring those around you....
"If you kids don't get your rooms clean, I'll put on the bear suit"

or

"Geez, James really pulled out the bearsuit in that meeting...."
by Lovebite June 12, 2009