Although most Scotsmen would approve of the sentiment, "The Scotsman Song" was actually written by an American, Mike Cross. The original recording, with instrumental accompaniment, runs to 2 minutes 41 seconds. The unquestionably superior capella - recorded before an approving audience - is by fellow American Bryan Bowers - and runs to around 2 minutes 26 seconds.
It is also known as "The Drunken Scotsman", "The Drunken Scotsman Song", etc.
Alexander Baron - London, England, for above 2