That’ll Be The Day
Sorry, I couldn’t help it using that picture. The phrase “That’ll Be the Day” oddly enough did not originate with Buddy Holly. It actually came from the German army (with a little help from the British).
Or the Prussian officer corps of the German Army during World War 1. They held a belief that someday the German Army would defeat the British and become the preeminent power in Europe. They referred to it as Der Tag or “The Day”. The phrase was used as a popular toast and appeared in many books and newspaper article. So many in fact that the British picked up and started yelling it across No Man’s Land as a taunt to the German forces.
So technically Buddy Holly wrote a song mocking the German army.