Self check 

A really lame basketball player that can't score. A player you don't have to hold.

Yo, we need to double Kevin Garnett 'cause that guy they signed to a 10-day contract is a self check.

Self check by gammarock December 22, 2004

self check-out 

When someone credit card swipes or scratches their ass and then smells it.

The girl on the subway platfrom this morning chose the self check-out. She scatched her ass, then sniffed it. we made eye contact and she the she dove into her shame hole.

self check-out by slobby1 October 26, 2011

Check yo self before you wreck yo self 

a saying that means you better watch before you step over that thin line and get yo ass into serious trouble.

Whoa whoa wait a minute nigga...you wanna pull out a .380 on me??? Fool you better chiggity-check yo self before you wriggity-wreck yo self!

Check yo self before you wreck yo self by Nick D February 27, 2003

check yo self 

To reevaluate your actions after realizing that your current course of action is likely to lead you into a troublesome situation. From Ice Cube's song "Check Yo Self."
See also: check yo self before you wreck yo self

Phineas: "The derivative of the hyperbolic arctangent of x is one over the quantity one minus x squared. Booyah, who's the man!"
Isaac: "Whatever. Your math skills are mediocre at best. I bet you couldn't even prove the Pythagorean theorem with a compass and a straightedge."
Phineas: "I believe those are fighting words. Let's take this outside. I'm going to slap you silly with my pocket protector!"
Isaac: "I suggest you check yo self before you wreck yo self. I've got three of my chess club buddies backing me up and one of them takes taekwondo!"

check yo self by Nicholas D February 18, 2009

you better check yo self 

Examine what you're about to do or say before you say or do it wrong. Expressed to people who usually are wrong and belive to think they are above the rest or have a right to do or say anything they want.

You better check yo self before you wreck yo self

you better check yo self by miaobaid August 25, 2014

Check yo self 

A command that is blurted out, usually angrily, by one individual to another as a condemnation of the latter's behaviour, actions or poor choice of words. Those who indict another with such a phrase normally do so if the said individual has severely offended or insulted them, and are calling upon the individual to think about what they have done and atone for their lack of judgement.

Variations of this phrase, such as "Check yo self foo!" and "Check yo self before ya wreck yo self" are also used to communicate the same message: correct your behaviour (idiot/before you get in trouble)

Check yo self before ya wreck yo self. them shotgun bullets are bad fo' ya health!

Check yo self by Street Shakespeare December 11, 2010

check yo self 

What you need to do before you wreck yo self.

"Check yo self, 'fo you wreck yo self, 'cause I'm bad for your heath - I come low stealth."

check yo self by XDavid PolicastroX April 16, 2009