The hide of a bull; loosely, any very heavy hide or skin.(noun)
The Century Dictionary (Public Domain)
Use "bull-hide" in a sentence
"She turned on the boss man after stepping daintily over his bull-hide tail."
"The first few stabs were uneventful, though it took several tries to get through the bull-hide."
"They travel from their own country in the south-east, and advance through the jungle, and when about to approach the herds, stoop down, covering their bodies with their shields of bull-hide."