Verb
(intransitive, chiefly US, informal) To exercise one's right to legal representation; to engage the services of a lawyer.
(intransitive, chiefly US, informal, business) To conduct matters in accord with legal formalities or so as to avoid legal risk.
Whenever we do business with those guys, we lawyer up to protect ourselves.
(transitive, informal, business) To arrange in a way reflecting legal advice.
By the time we finished lawyering up the agreement, we didn't want to sign it.