Something that gores or pierces, such as a weapon with a pointed end, or an animal that uses its horns to gore.
From the verb 'gore' (to pierce with horns or a pointed object, from Old English 'gar' meaning spear) plus the agent suffix '-er', creating 'one who gores.'
The suffix '-er' is so powerful in English that you can attach it to almost any verb to create a noun meaning 'something that does this'—a coffee maker makes coffee, so a gorer is simply something that gores, showing English's brilliant productivity.
Complete word intelligence in one call. Free tier — 50 lookups/day.