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step out on someone

Slang definitions & phrases for step out on someone

step out on someone

verb phrase

To be romantically or sexually unfaithful to someone; cheat, two-time (1940s+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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