Green’s Dictionary of Slang

Harry Blows n.

[rhy. sl. + ref. to blow v.1 (3c)]

In compounds

Harry Blows (n.)

(N.Z. prison) the nose.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 85/1: Harry Blowsn. nose [associated with the drug user's meaning of 'blow' = to inhale powdered drugs through the nostrils].