(1) To tell a correctional officer you're in fear of being physically assaulted by other prisoners and want to be placed in protective custody.
(2) To threaten another prisoner, so that he has to tell a correctional officer he's in fear of being assaulted by other prisoners and wants to be placed in protective custody.
Used in jails and prisons, to "check in" means to request a transfer into protective custody. Protective custody is an area within a prison or jail where security is tighter and officer presence is more pronounced. Protective custody is used mainly for rats, people with mental illness and sex offenders.
Encore @ The Wynn European Pool
Maida: oh my gawd do you see that old lady in the pool flashing her boobs
Debbie: I don't care how much she paid for those titties, no one needs to see that.
Maida: She needs to check in and put those things away.
When a fuckboy periodically txt you or call you every other day or week to check in on how you are doing and if he feels that he is losing you to someone else, he will proceed to ask a bunch of questions to draw you back to him
Real man will always want to know what their woman is doing, to see how her day was and be there when she is having a bad day. Don't be that dick who check in on his girl every other day and pretend to be interested.
"Dude, I was with my girlfriendyesterday and this Nice Ass Chick was walking by, I really wanted to look at her, but I had to "Check-In," to my lady. Shit.