Green’s Dictionary of Slang

a euph. for bloody adv.

1932		F. Jennings Tramping with Tramps 144: If Joe comes along he can blurry-well hop it again.
1949		I.L. Idriess One Wet Season 172: Easy feller fall ’im over log! Blurry big donkey, that one!
1956		J. Reynolds Woman of Bangkok (1959) 42: I’m blurry lucky.
2001		K. Waterhouse Soho 22: She didn’t like it. In fact she blurry hated it.