Hampden roar

noun

The infamous crowd noise said to come from Hampden Park, Scotland's national football stadium, while a match is being played.

Also used in rhyming slang, as in "What's the Hampden roar?" for "What's the score?" when referring to the score of a football match.

"Can ye hear the Hampden roar?"

"What's the Hampden roar, my good man?"