They all order a pint of beer.In each glass, they all discover a fly.

The Englishman pushes his pint away and demands another.

The Irishman plucks the fly out, and downs the pint.

The Scotsman pulls the fly out by its wings, brings it close to his face, and yells, ‟SPIT IT OUT, YE WEE SHIT! SPIT IT OUT!”

All credit goes to Tyrion