Origin of tra-la
Examples from the Web for tra-la
Then Kipps began to sing, "Ar pars eight tra-la, in the lane be'ind the church."
"Tra-la, tra-la-la-la-la," chirped he, softly and contentedly.The Diamond Coterie|Lawrence L. Lynch
"Tra-la, comrade," he shouted, leaping out of the cellar as soon as he saw me.Lords of the North|A. C. Laut
The "tra-la" was considered to render this sentence incomprehensible to the uninitiated.
He took the doll and jumped it up and down in the air, dancing about and singing, “Tra-la.”