Webster's Revised Unabridged Dictionary · 1913

hep

hep (hep) , noun

See Hip, the fruit of the dog-rose.

hep (hep) , adjective

Same as Hip, a., but older and now less frequently used.

hep (hep) , interjection

A call used by drill instructors to count cadence during marching; used identically to hut and hup.