It's better than piddle.

"If anybody ever marries you, it will be for the pleasure of hearing you talk piffle," said Harriet, severely.  (Harriet Vane to Lord Peter Wimsey [her future husband] in Strong Poison by Dorothy L. Sayers.)

Aha - a litmus test of relationships!  If anyone ever insults me so endearingly, I'll know I'm onto something good.