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1.
Insult - A girl that is well known to become extremely drunk to the point of passing out and puking. Usually at big get together's where the embarassment the next day for such a girl is worse.
"Dude! That girl is such a lushbag."

*The day after* "What's up Lushbag."
by Kelsey H. July 08, 2005
 
2.
someone who gets extremely intoxicated, very slutty flirt, man stealer, puts out after only 1 sip!
Sofia Bragagnolo is such a lushbag
by EMSB April 04, 2011