headbutt

thumb|Caricature of capoeira carioca from Rio, using cocada headbutt.

A headbutt or butt is a targeted strike with the head, typically involving the use of robust parts of the headbutter's cranium as the area of impact. The most effective headbutts strike the most sensitive areas of an opponent, such as the nose, using the stronger bones in the forehead (frontal bone) or the back of the skull (occipital or parietal bone). The word is both a noun and a verb.