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2.
When you are outside in the cold without a coat but you are so drunk you feel warm.

Similar to a whiskey bandage
Hey Caitlin aren't you cold out here in just that t-shirt?

Nah I'm good I got a liquor jacket.
by Gonzo Writer November 19, 2013
 
1.
"Liquor Jacket" refers to the phenomenon of not being able to feel cold while drunk. The term is synonymous with "Beer Jacket", but has a much nicer ring to it.
I hate walking through this frozen college town on the way to parties... Good thing I have my liquor jacket on.
by alphabet gumdrop August 21, 2008