Mir is a word for a last line of defence to make sure you end and win that arguement between your best friend or worst enemy. It works 100% of the time 60% of the time.
Josh: Dude you just screwed up on that art procect your gonna get a F now.
Mitch: Nah i added design i'll defineetly get and A.
Josh no trust me your gonna get a F.
Mitch: You know what mir.
The conversation is now over you have left your enemy babbling and trying to find words for a come back.
Mitch: 1
Josh: 0
Mir is the most warm-hearted and gentle person you will ever encounter in your life, from not being able to make her move on a boy, while being in love with timothee chalamet at the same time, to overall just being a haw tee.