Musth
PERIODIC CONDITION IN BULL (MALE) ELEPHANTS, ACCOMPANIED BY A LARGE RISE IN REPRODUCTIVE HORMONES
Musth or must (; , from Persian, )The Oxford Dictionary and Thesaurus: American edition, published 1996 by Oxford University Press; p. 984 is a periodic condition in bull (male) elephants characterized by highly aggressive behavior and accompanied by a large rise in reproductive hormones.