Check me 45

Hey look at me while i do something stupid.

*Standing on top of something that shouldn't be stood on*
Guy: Ayeeee check me 45
Guy #2: Stop saying that you are an idiot.

pre-release safety-check

Refers to either:
(1) Where you ask a gal if there would be any chance of her getting pregnant before you "let go" inside of her, or
(2) Where --- prior to your letting go of a door and allowing it to close again after you've been holding it open for one or more persons passing through --- you briefly duck your head around said door to make sure there aren't any other people heading for the doorway, thus avoiding your accidentally letting the door slam in the faces of these previously-unobserved folks.

Clueless dude, speaking plaintively to a social-advice counsellor: I always make a point of performing a pre-release safety-check before I let go of a door after holding it open for others; it just seems like a lot of times, the folks who are inside the house or store yell at me to "not let the heat out" or "not let the bugs in". Well, what da HECK am I SPOSTA do --- just blindly let da door slam shut again and risk bruising someone's face?!
Counsellor (gently and seriously): Oh, nooooo --- of course not. I would suggest standing inside the doorway so that you can see both inside and outside at the same time simply by turning your head; that way, you can check for stragglers during the final few seconds while the last person is entering/exiting the room, and thus it will not take any extra time to be safe.

Checking the competition

The act of peeking over the divider between urinals and looking at another man's penis

Dude 1: (Checks the competition)

Dude 2: What the hell was that man?! Are you gay?!

Dude 1: Hell no! I'm just checking the competition.

loaf check

The process of checking the quality of a cats loaf position.

Loaf check:
- No tail
- No paw visible
That’s a 10/10 loaf

Checked Cams

AMOGUS CAMERAS I SAW PURPLE VENT ON CAMS!1111

1: I SAW PURPLE VENT!
1 : I CHECKED CAMS
2: ok cool, we dont care.

to check "it" out

When a horror movie character hears something suspicious and instead of running away like a normal person goes after the sound.

to check "it" out Definition
Dude 1: did you hear that?
Dude 2: yea lets go check "it" out
Dude 1: fuck you mean check it out im outta here
Dude 2 dies in pain while Dude 2 married his highschool crush got 2 kids and is working together with Elon Musk

Peepee Poopoo check

A meme with shrek that also went viral on tiktok.

"Ayo, peepee poopoo check!
Peepee poopoo, oh, ooooooh!
Peepee peepee oooooh"