n an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
n a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
Chalk artists to decorate Market Street pavement PARKERSBURG - "Chalk Chill" will be held this weekend on Market Street from Seventh to Fifth streets.
June 12, 2013 - Parkersburg News and Sentinel
Chalk it up: Art competition draws crowd SARATOGA SPRINGS -- Chalk artists portrayed several cartoon characters at the Saratoga Splash sidewalk art competition Monday evening, although SpongeBob SquarePants won the popularity contest.
June 11, 2013 - Provo Daily Herald
Roger Goodell in ESPN The essence of Bill Walsh was that he was an extraordinary teacher,NFL commissioner Roger Goodell said. "If you gave him a blackboard and a piece of chalk, he would become a whirlwind of wisdom."
Kobe Bryant in Seattle Post Intelligencer I don't think they did anything differently,Bryant said of Gasol and Odom's shooting. "I think they just missed a lot that they usually normally make, so you just chalk it up."
President Bush in Newsday You brought new glory to one of our nation's most storied basketball programs, and you gave your fans all across America one more reason to chant: Rock Chalk, Jayhawk!,Bush said, using the school's famous chant to the delight of a loyal...