A sexual term, closely related to the angry unicorn.
It requires one person to strap two dildos to his/her head, one smaller than the other, while partner spreads her legs wide. Person with dildos strapped to head (rhinoceros) charges headfirst angrily into the receivers vagina and anus.
My girl wanted to go on a safari, but I told that bitch it's too expensive, and instead gave her the Angry Rhinoceros. Although now she can't walk right, it was quite cost effective.