(noun) A theory regarding a mystery. Refers to the practice of chalkboarding/whiteboarding ideas and expanding on them.
(verb) To actively theorize about said mysteries. Often used when someone is coming up with tinfoil theories.
"Man, so men and my friends were chalking about who Rey's parents might be..."

"Did you hear the chalk about Sylar and Peter Petrelli?"

"After those first teasers dropped, it was crazy how much chalk was flying around about what was going to happen in season 3 of Westworld."
by Rawnie Phen October 31, 2020
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Tom: "What's that?"
Sarah: "This? Oh, this is not-chalk."
by Babs Maloney November 6, 2007
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A derogatory term used for a 'dusty' guy, usually one lacking any wheels, or is just in general, someone who is very uncool.

This is a thinly concealed racist term, deriving from "Choc," a slang term for a black person.
"Adrianna's dating a complete chalk, you can definitely outwheel him."

"Look at those dusty chalks at the club hitting on those girls."

"Popped collar? What a chalk!
by balbir December 7, 2011
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London expression for coke (cocaine)
That's mighty fine chalk you've managed to acquire from Bristol.
by Dan Fox June 19, 2003
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1. A hard, white, powdery substance traditionally used to write on slate panels and other hard surfaces. CaCO3, calcium carbonate.

2. To mark, as with chalk.

3. To meet a mark or level fully; to be full to a limit.

4. To attribute to someone or some thing.
1) Please select a piece of chalk and write your name on the chalkboard. This is your first warning.
2) I'll just chalk a picture here on the sidewalk.
3) That barrel is chalk full of grain.
4) You can just chalk that up to the devil's handiwork.
by ninjamanzz September 3, 2012
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Another word born in Cheltenham High School meaning any of the following:
1) to blow something off
2) to damage, destroy, or hurt someone/something
3) to ignore or disregard
4) to take it like a boss
"Yo man, aren't you supposed have a date with your girl tonight?"
"Yea, whatever... I'm chalkin it to go see this other chick."

"Damn, i don't remember learning any of this. I'm about to chalk the shit outta this math test."

"My car got all chalked up from the accident i got in."

"He pissed me off so i chalked the mess outta him."

"You be aight. Just chalk it up bro."

"I'm real tired... i think i'ma chalk school today."
by truelu March 5, 2010
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