The name Goatmen came from me calling my training partners "Mountain Goats" one grueling day in the mountains.  Over time, I dropped the "Mountain" and started calling them "goats".  And, it became a fictional verb that means crushing a hill, as in, "You really goated that hill, Joe."  At any rate, it stuck and now I call my guys the Goatmen.  By the way, I don't claim to have goat-like qualities like my friends.