The post that was quoted here has been removedButt (n.)
1. the hind end of an animal or human (i.e. arse or a**)
2. the ridiculed focus in a joke. (i.e. Phlabibit)
3. the end of a rifle stock.
4. someone who displays mean spirited character (i.e. loads on RHP)
(v.)
1. to ram into another object, usually with the head.