A fork of Rural Dictionary
When you put chalk on your hands when your lifting weights and you go to the bathroom and whip out your dick and you get chalk on it.
Man i gotta piss. Dang it! I got Chalk Dick!
To scrape someone's penis on concrete in broad daylight.
"You know what? I'm gonna Chalk yo dick bruh." "bro got chalk dick yo." "Bro got Chalk in his dick!"