This is an original headcanon I made up.
The song ‘Sweet Caroline’ by Neil Diamond came out in 1969 and the Marauders and co were around 9 years old, this song then stayed popular till around 1974. This would fit into the time frame of their years at Hogwarts which was 1971-1978
Now imagine the marauders and co jamming to this song in the common room and just belting out the bum bum bums at the top of their lungs (with the exception of Sirius and James screaming them) until McGonagall would come into the Gryffindor corridor and make them turn it off/down.