This novelty song was written by Rolf Harris and recorded by him as the B-side of his 1961 Christmas song "Six White Boomers." It was, or appears to have been, recorded before a live audience.
Suggestion credit: Alexander Baron - London, England
In this song, a young boy gets lost in a store. Shoppers try to help, but all he'll do is scream "I've lost my mummy!" When his mom shows up to claim him, she give him a good whack. Now he's upset for a different reason: "I've found my mummy!" he screams.