To drink an excessive amount of alcohol; to drink alcohol until one is thoroughly inebriated. There was a free bar at the wedding reception, so half the guests were lushed up before we even sat down to dinner. I've gotten too old to go out and lush up on a Friday night—my body can't handle the hangovers the next day!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.