cross up someone
1. To deceive or swindle someone. A noun or pronoun can be used between "cross" and "up." Don't cross up that guy if you want a job in publishing—he's a celebrated editor.
2. To confuse or mix up one or more things. I must have crossed up the files—this paperwork doesn't belong in here.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
cross up someoneverb
See cross someone up
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.