So if you had an Irn-Brother in 66 that would somehow make sense?
Irn-Bru is a VERY popular soft drink in Scotland. Its a reference to England banging on about 1966 and the world cup.
What he's saying is that he had an Irn-Bru in 1966 but he's not still banging on and on and on about it FIFTY frikking years later.
Ye get mae?