He didn't actually know any songs or how to play an instrument and, in fact, just threw cantaloupes at the audience during his concerts, but he was able to hide this ignorance by telling people that he was just "jamming out."
Madness string 45764
When I was a child my mother would tuck me into bed, and each night as she kissed me, these are the words that she said. She said don't go to bed with strangers. Don't play with the dead. Always keep your wits sharp like an axe inside the shed.