Pettifog

Part of speech: verb (v.)

To do a petty business as a lawyer; also, to do law business in a petty or tricky way. "He takes no money, but pettifogs gratis." S. Butler.

Part of speech: verb (v.)

To advocate like a pettifogger; to argue trickily; as, to pettifog a claim. [Colloq.]