To "Check-in" is in a sense, the opposite of "checking someone out."
"Dude, I was with my girlfriend yesterday 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.
by Vanilayak August 27, 2009
Get the Check-in mug.
To reflect on your status or position, and ensure that your attitude is aligned.
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.
by phon3guy September 5, 2014
Get the Check In mug.
a phrase used to emphasize something awesome thats about to take place or that has just happend..
hey your part in the song is comming up
check it check it
..then begins to sing loudly.
by AC MARMALADE April 21, 2010
Get the check it check it mug.
An insult used to describe a person, which is usually followed by the phrase "looking ass nigga"
Boy Im going to check the shit out your ass: mop top carrot top looking ass nigga
by CaptainGarbage December 2, 2009
Get the Check mug.
Check this out, look here, see this. Often used in a situation concerning something considered awesome. Also a skateboard stereotype slang word. It is most often used by guys. It can also be used concerning a pretty girl, as seen in example two.
Example 1:

A: Hey dude! C'mere!
B: (Walks over) Yeah?
A: Check this! I just learned it from Matt.
B: 'Kay. Show me.
A: (does some sort of cool skateboard trick)
B: Awesome, dude! Teach me!

Example 2:

B: Hey, c'mere!
A: What? (walks over)
B: Look over there.
A: ?
B: Follow me!
A: Alright...
B: (Walks a short distance)
A: Huh?
B: Check this... (points to a group of girls)
A: Ooooh! :) Yum!
by InsanityisSexy:) May 24, 2011
Get the Check this mug.
Check is inting on Nunu again!
by Kwuartzz April 4, 2022
Get the Check mug.
"Are you checking her?"
by rikz May 25, 2006
Get the checking mug.