noun
horn
HORN/hɔːrn/
A hard pointed growth projecting from an animal's head.
The goat's pointed horn has a rough, naturally textured surface.

Etymology
Old English horn named an animal’s horn as well as a projection or pinnacle. The selected sense preserves its concrete anatomical meaning: a pointed growth on the head.
In context
bull of swanies. I get get a foot on his head and he flips me and throws me down. He sticks a horn in me