1. Confessing one's sexual love for another of the same sex.
2. To date females to try and hide this embarrassing gay man love fantasy.
3. To "accidentally" cozy up to your buddy when he is passed out due to the GHB you dropped in his drink.
4. To act totally shocked when your said buddy breaks your face when he awakens to your gayness on top of him.
"Dude, that's the second time this weekend that you have Millsed me! Go find someone else to drink with, homo!"
"I just thought he was a sensitive, old fashioned guy who wasn't dating me to get in my pants. It turns out he was a Mills!"
Ean, Cale, and Eric went on an epic journey to find a mill.
2. Something average, shortening of 'run of the mill'.
"won't be going back to see that film, it was pure mill"
"Dave's party was so mill I had to leave before ten"
Girl2: EEEEEEEEEEEEW! You are SO unlucky!
Guy 2: I had One and I lost her.Trying to replace her will be hard.