n. A good friend; a comrade.n. A partner, especially one of a pair or team associated under the buddy system.n. Friend or comrade; chum. Used as a form of familiar address, especially for a man or boy: Watch it, buddy. verb-intransitive. To associate as a buddy or buddies: buddied around with the older guys. phrasal-verb. buddy up To ingratiate oneself, as by presuming friendship: buddied up to the coach in hopes of making the team.