slang : to engage in a fight : exchange blows aggressively
the two boxers stopped stalling and mixed it up
battle groups were mixing it with German tanks — Russell Hill
hate to see the day when men were afraid to mix it up for pretty girls — J.A.Michener
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mix it (slang)
1. To fight forcefully
2. To cause trouble
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Main Entry: ↑mix
Useful english dictionary. 2012.