All we need is somebody to buddy up to him, and take him out there.
1850, American English, possibly an alteration of brother, or from British colloquial butty "companion" (1802), itself perhaps a variant of booty in booty fellow "confederate who shares plunder" (1520s). But butty, meaning "work-mate," also was a localized dialect word in England and Wales, attested since 18c., and long associated with coal miners. Short form bud is attested from 1851. Reduplicated form buddy-buddy (adj.) attested by 1952, American English.
Lenny Kent, a long-time fave here, is really in his element. ... After four weeks here he's got everone in town saying, "Hiya, Buddy, Buddy" with a drawl simulating his. [Review of Ned Schuyler's 5 O'Clock Club, Miami Beach, Fla., "Billboard," Nov. 12, 1949]Buddy system attested from 1920.
1931, perhaps originally U.S. underworld slang, usually with up, from buddy (n.). Related: Buddied; buddying.
To share living quarters and conditions with; form a close association or two-person team: These guys are alike; OK if they buddy up?/ Swimmers, buddy up (1930+)
[1850+; fr earlier butty, ''partner, chum,'' said to be fr Romany; probably influenced by a childish pronunciation of brother]