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wise up to
Make or become aware, informed or sophisticated, as in
It's time someone wised you up to Mary; she's an incorrigible flirt
As soon as Tony wised up to what the company was doing, he quit
; early 1900s
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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wise up to