HEP Meaning of HEP in English hep 1 /hep/ , adj. Older Slang.hip 4 . [ 1900-05, Amer. ]hep 2 /hut, hup, hep/ , interj.one (used in counting cadence while marching). Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012