term used in UK mainly South Wales valleys among working class, can be used towards (1)a friend, (2)acquaintance, (3)enemy or (4)somebody you don't even know...
eg.1 "Alrite butt, hows your mother doin?"
eg.2 "Oh butt, get them photocopies done now innit."
eg.3 "Oh butt, you got my misses pregnant, im gonna fuck you up"
eg.4 "Oh butt, have you got 20p i need to catch a train home to Ponty"(Pontypridd, center of the valley universe)