A chant made up by KU science professors back in the day. Due to the limestone, chalky rocks found near the University of Kansas campus. Also Chalk is about the only thing that rhymes with jayhawk. Used by Kansas fans during sporting events.
One of the most inane chants in the history of collegiate sports. KU students will, in a very Tourette's-like fashion, break out the phrase at seemly random, inappropriate times. They tend to attach a "man" or "motherfucker," further implicating their level of douche.
"Our football team is undefeated, and who gives a shit if our strength of schedule was below Yale's, rock chalk"
"We'll forever harbor extreme resentment over the departure of Roy Williams, rock chalk"