Bloke goes to Merthyr and buys himself a parrot and takes it home. After a few day’s he’s had enough. All the parrot will say is ‘I’m from Merthyr, and i’m hard as ■■■■’.
So the bloke thinks right, if your so hard have a go at this, and puts a kestrel in the cage. The next morning he finds the kestrel dead and the parrot shouting ‘I’m from Merthyr and i’m hard as ■■■■’. So the bloke buys a golden eagle and puts that in the cage. The next morning he finds the parrot completely featherless and the eagle on the floor dead. The parrot looks at the bloke and says ‘Duw, ■■■■, had to take my coat off for that bugger!’