He played in the Move. This is not enough to earn a bitchslap.

He formed the Electric Light Orchestra. This is not quite enough to earn a bitchslap.

He produced albums of lame music for Roy Orbison, Tom Petty, George Harrison, and others. He was part of and produced the Travelling Wilburys, the low point of the recording careers of every other artist involved. It took Tom Petty a decade to recover. And he turned "Free as a Bird" from a Beatles song to an ELO song.

For me, I'd jump from bitchslap to horsewhip.