Green’s Dictionary of Slang

check v.

1. [1920s+] (orig. US) to look over, to inspect.

2. [1970s+] (orig. US) to visit, to see.

3. [1970s+] (orig. US) to criticize, to attack verbally.

4. [1980s+] (W.I./UK black teen) to see someone, to have a (usu. sexual) relationship with someone; thus checking, having a relationship.

5. [1990s+] (US black) to kill.

6. [1990s+] (orig. US) to assess, to envisage.

7. [2000s] (US prison) to fight; usu. as checking n., a fight.

In phrases

check ’em

[2000s] (US black) a phr. apologizing or acknowledging a foolish remark or action.

check for (v.) [1960s+] (W.I./UK black teen)

1. to seek out.

2. to like, to be involved with.

check it (to) (v.)

[1930s+] (US) to say goodbye.

check oneself (v.)

[1960s] (US) to compose oneself, to ‘get a grip’.

check out (v.)

see separate entry.

check someone’s chin (v.) (also chin check)

[1990s+] (US black teen) to hit on the jaw; such a blow is a chin-check.

check you (also check you later, ...on the flipside)

[1970s+] (orig. US black/campus) goodbye, see you later.

SE in slang uses

In phrases

check in (v.)

see separate entry.

check it in (v.) [the idea of checking possessions into a left-luggage locker]

[1990s+] (US black) as an imper. used by a mugger to his or her victim, to demand that someone hand over their money, valuables, etc.

check off (v.) [he checks his name off the general population]

[2000s] (US prison) to request protective custody.

check one’s bicycle (v.)

a euph. phr. to disguise one’s desire/need to visit the lavatory.

check one’s nerves (v.)

[1940s] (US black) to take a grip on oneself, to control one’s emotions.

check out

see separate entries.

check someone’s oil (v.) [euph. but note oil n. (1)]

[1930s+] (US) to have sexual intercourse.