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To make or keep one informed about something, such as a plan or project. A noun or pronoun can be used between "loop" and "in." We've hired a new intern to help you with data entry, so be sure to loop her in about the current project. I'll need to go loop in the rest of the team regarding these changes.
See also: loop
slang Severely intoxicated with drugs or alcohol. We all got pretty looped at the staff party, so no one was feeling particularly productive in the office the next day. Jenny must have taken something at the party, because she looks totally looped.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
mod. alcohol intoxicated. She got loopy very quickly and had to be helped to a chair.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.