Kola veri - Murderous Rage
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That would be the literal translation...
Now colloquially , this is often used when expressing high voltage anger.. As an example - After seeing the poor service of Craptel .. I am in kola-veri
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In chennai , you would see this word often being used to express anger (even in the average scenarios , small arguments , disagreement ) ... Such that being used doesnt often indicate that you are in a murderous rage - just plain anger/frustration