Green’s Dictionary of Slang

distiller n.

[abbr. walking distiller under walking adj.]

(Aus.) one who cannot take a joke.

[UK]D. Sladen in Barrère & Leland Sl., Jargon and Cant I 313/1: Distiller (Australian convicts’ slang), one who is easily vexed and betrays his chagrin. Vide CARRY THE KEG. Probably not of colonial origin but introduced by transportees.
[UK]Farmer & Henley Sl. and Its Analogues.