If someone head-butts you, they hit you with the top of their head. He was said to have head-butted one policeman and stamped on another's hand. Head-butt is also a noun. The cuts on Colin's head could only have been made by head-butts
butt head
التركية النطق
bʌt hed
النطق
/ˈbət ˈhed/ /ˈbʌt ˈhɛd/
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[ 'b&t ] (verb.) 13th century. Middle English, from Old French boter, of Germanic origin; akin to Old High German bOzan to beat; more at BEAT.