It means if you don’t have anything positive to say, just don’t say anything and keep it to yourself.
Person 1: You’re ugly and you suck
Person 2: If you don’t have anything nice to say, don’t say anything.
by Enter A Name Here August 21, 2023
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An insult. Almost like you’re worthless. You are just anything, no substance, no value
by Itsthatbxtch May 3, 2023
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