the rough edge of your tongue

the rough edge of (one's) tongue

A harsh scolding or rebuke; a verbal lashing. The teacher gave us the rough edge of her tongue after she caught us reading comics in the back of class. I know you feel they deserve the rough edge of your tongue at times, but you need to show some restraint or you're going to lose their respect.
See also: edge, of, rough, tongue
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

the rough edge (or side) of your tongue

a scolding.
See also: edge, of, rough, tongue
Farlex Partner Idioms Dictionary © Farlex 2017
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