tv. to betray someone. (Originally a more complicated switching of sides in a conspiracy wherein the double-crosser sides with the victim of the conspiracy—against the original conspirator.) : Don't even think about double crossing me!
n. a betrayal. (See comments with sense 1.) : It's one double cross Frank is sorry about.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw-Hill Education.
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