pro

   a prostitute

   A shortened form of professional, or prostitute, or both:

    You the bloke that floated them pros out to the Everett? (Theroux, 1973 — some prostitutes had been sent out to a ship)

   A pro-pack, a contraceptive kit which was issued to soldiers in the Second World War, came from prophylactic, despite being for use (for the most part) with an amateur.

   Neither of these definitions should necessarily be applied to a PRO (public relations officer) or to the pack of information with which he is likely to encumber you.