snotter, v. — Green’s Dictionary of Slang

snotter v.

[ext. of Scot. snotter, to hit on the nose]

(Aus.) to kill; thus snottered adj., killed.

1919		W.H. Downing Digger Dialects 46: snotter (vb.) — Kill.
1924		(con. WWI) A.G. Pretty Gloss. Sl. [...] in the A.I.F. 1921–1924 (rev. t/s) n.p.: snotter. Kill; ‘snottered’, Killed.
1930		(con. 1910s) D. Mackenzie Hell’s Kitchen 99: You know, if someone calls any one of us a thief we get very indignant and are ready to ‘snotter’ him, and the beauty of it is that we are thieves.