What is Butt ?
Butt is (noun) 1. a large container for water or wine It has rained a lot lately and the rainwater butt is overflowing. 2. the end of a cigarette which has been smoked He picked up old butts from the pavement. 3. the end of the handle of a gun which presses against the shoulder of the person firing it The prisoners were beaten with rifle butts. 4. a person whom other people laugh at He will always be the butt of their criticism if he doesn’t dress any better. 5. a push with the head The goat came up behind him and gave him a butt with its head. 6. US buttocks to give someone a kick in the butt ((verb)) to push with the head The goat lowered its head and butted him.
source: Easier English, Student Dictionary Upper Intermediate Level