'Pompatus' of love

I’ve been a steve miller band fan all the way from Sailor up to but not including that stupid Billy jo and Bobby sue thing, thanks for clearing up the 'properties ’ of love thing as I’ve been singing even on stage the wrong word all these years, no one knew the difference anyway, Tx, Bizet

Welcome to the Straight Dope Message Boards, Bizet, glad to have you with us.

It’s helpful to other readers if you provide a link to the column upon which you are commenting, helps keep us all on the same page. In this case, I presume, In Steve Miller’s “The Joker,” what is “the pompatus of love”?