This is slang for a drinking spree. I wonder if the Brannigans were neighbours of the Hooligans? Also slang for a baw.
Brawn or head cheese is a charcuterie product consisting of rendered down meat from a pig's head, excluding the brain which is used for other purposes, seasoned with herbs and flavourings, poured into a mould, pressed and coated with aspic. It is eaten as a first course.
A brazier is a metal pot with a short handle and a thick bottom which is used either on top of the oven or inside it for braising.