Meaning of TELL ON

WordNet Dictionary
	Definition:		[v]  produce an affect or strain on somebody; "Each step told on his tired legs" [v]  give away information about somebody; "He told on his classmate who had cheated on the exam"
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	Synonyms:		betray, denounce, give away, grass, peach, rat, shit, shop, snitch, stag
	See Also:		affect, bear on, bear upon, impact, inform, sell out, tip off, touch, touch on