Adding 'bottom' as a prefix to hombre implies that the person is quite an unsavoury or malicious character - the lowest of the low.
"I was roller-blading through the park the other day when I caught a guy exposing himself to a tramp - what a bottom hombre. Good job that tramp's blind."
"My mate, Mick, is a serious social retard. I know he's balding, but if he wasn't such a bottom hombre when he's drunk, he would surely be able to get a girl to fidget with his manhood."