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Avoid these words. Seriously.

on to someone

Slang definitions & phrases for on to someone

on to someone

adjective phrase

Aware of, esp of something shady or forbidden; wise to: Watch it now, I think the guard is on to you (1877+)

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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