Pettifogging: Petty or trivial.
“Look, his horse’s tunic isn’t pressed properly. There’s a big crease in that lion.”
“Oh, yes?” Mabel eyed her rival scornfully. “At least I know how to buff a breastplate. Verily your husband’s armour is as dull as ditchwater.”
Deirdre fumed. It didn’t matter that her brave knight Lionel won most jousts against Edward. Mabel focussed on these pettifogging details as a defence, and dragged Deirdre down to her level.
“Aha!” said Deirdre, eyes aglow. “Another knight hath knocked your husband off his horse with his lance.”