Check-in chick 

Name for a check-in attendant at an airport or hotel.

I work for American Airlines as a Check-in chick.

Check-in chick by smadav August 11, 2008

Check-in chicken 

A game of proceeding to the gate as late as possible, without missing the flight. Everyone except the last passanger arrived at the airport is considered a check-in chicken.

- Yo man, I guess it's time to go!
- No way bro, who comes two hours before the flight? Don't be such a check-in chicken.

Check-in chicken by bugpower October 19, 2015

Check-in/Check-off 

Check-in/Check-off
References used among inmates incarcerated within institutions of the Canadian Prairie region and possibly other institutions nationally or internationally.

Check-in: An inmate who is unstable and acts in such a way that Corrections Officers are left with no option but to upgrade the inmate's security level and have him or her removed from a low security setting.

Check-off: An inmate who is forced to move units by other inmates. This scenario is often initiated by gang members in an attempt to create available bed-space with the hope that free beds will be given to "bro's" or, in the case of a woman's institution, "bitches."

Check-in/Check-off

Check-in: "Fuck, bro, look at this crazy check-in. What a bitch. The goof (see definition) didn't last a minute before freaking."

Check-off: "You'd better check-off, bitch. The bro's need a bed and if you don't check-off you're gonna get done-up (likely stabbed with an improvised weapon , or shank (see definition), or severely beaten. )

Check-in/Check-off by Mr. Muggs June 12, 2017

Check In 

to meet with or speak with the local street representatives to gain permission to move about freely in their respective local area.

Tekashi69 Says He Doesn’t Check In With Gangsters...that was a lie.

Check In by BobbyLarryIrene September 21, 2019

Chrish Check-in 

Convincing a hotel to let you check-in super early because you’re only going there to fuck.

Luckily the hotel let us have a Chrish check-in because she was gagging to be fucked senseless.

Chrish Check-in by Chrish77 October 27, 2018

check in 

(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.

The shot caller decided to check in the guy who got caught stealing from B.J.'s locker.

check in by Tochterlieber January 5, 2017

Check in 

Determining if someone is all right or on task.

Asking everyone in a meeting to tell one by one how they are doing.

I'll check in with you after work.

We'll start the meeting with a check-in to see how everyone is doing this week.

Check in by Cassidy Vall May 11, 2011