American & Australian, informal, American, informal

to fight or argue.

Don't take any notice of Sally. She just likes to mix it.

He was seen mixing it up in a brawl after the game.

• hard on the heels of something
• hard put to
• hard put to do something
• hard row to hoe
• hard sell
• hard stuff
• hard to swallow
• hard to take
• hark back to
• hark back to something
• harm a hair on head
• harm a hair on someone's head
• harp on
• harp on something
• has-been
• has got game
• hash out
• hash out something
• has more bark than bite
• Has the cat got tongue?
• Has the cat got your tongue?
• hatchet job
• hatchet man
• hate guts
• hate someone's guts