Background: "Breeks" - trousers or pants.
"Donald Where's Your Troosers?" is a comic song about a Scotsman who wears a kilt rather than trousers. It was written by Andy Stewart with music by Neil Grant. When performed by Andy Stewart and the White Heather Group, it was a hit in 1960, reaching #37 in the UK charts and #1 in Canada. When re-released in 1989 it became an even bigger hit, reaching #4 in the UK.
A video for this song: