Chewin in the Chung

An Englishman, a Scott and an Irishman walk into a sleazy bar. There are drunks passed out on the floor and flies buzzing around but they all three belly-up to the bar. Each of them orders a pint of "the black stuff" and, as chance would have it, a fly lands in each of their beers.

The Englishman pushes his pint away and tells the barkeep to bring him another.

The Scott doesn't even notice the fly and drinks it down with his stout.

The Irishman deftly grabs his fly by the wings and holds it over his beer yelling, "Spit it out, ya bastard!!"