The act of having sex with animal horns/tusks. The woman inserts the non-sharp end of the horn. She then has sex with her partner's anus or vagina. If she masturbates with the horn, she lifts only one leg up and inserts the sharp end of the horn and continues until orgasm occurs. Different sharp objects can be used for this act, such as a butterknife, a cone, etc.
Man, Julie was masturbating with a goat's horn yesterday. I think she called it the Wicked Horn. Fucking crazy.