Terminology: Bump and Run

A successful passing attack is routinely based on the timing between a Quarterback and his receivers.  However long it takes him to set up and throw equals the time it takes the receivers to work their routes.

Bump and run is about disrupting that timing.

The “bump” part is when the Cornerback “jacks” the receiver at the line to prevent his clean release.  The “run” part is the man-to-man defense he plays after.