Green’s Dictionary of Slang

(Aus./UK) a euph. for bloody adj.; also as adv.

1939		D. Thomas ‘Old Garbo’ in Portrait of the Artist as a Young Dog July 191: He put the receiver down. ‘That boy ‘s a buddy dreamer,’ he said to no one. He never swore.
1957		D. Niland Call Me When the Cross Turns Over (1958) 25: ‘Gorblimey, haven’t they buddy well hanged you yet?,’ greeted Fiddley Dick. [Ibid.] 200: ‘Too buddy good for a trouble-maker like that,’ Fiddley Dick said, ‘Buddy terrible what some of them will do to turn decent men against each other.’.