Paddy's Leather Breeches

"Paddy's Leather Breeches (or Britches)" is a traditional jig familiarly known as the "Irish Jig" by Scottish dancers, and part of the modern repertoire at dancing schools.

The Irish Jig is a Scottish caricature of an Irish person, gesturing angrily and frowning, and also a tribute to Irish stepdancing. It is based on traditional Irish steps but with arm movements added. The Scottish version of the Irish Jig is meant to parody an angry Irish washerwoman when she finds out some neighbourhood boys have knocked all her clean washing to the ground. Another version describes a washerwoman who shakes her firsts and flounces her skirt because she is furious with her husband who has been out drinking at the pub until the wee hours and has squandered all the money.

Here's a youtube clip of an Irish and Scottish jig, danced to this tune.