Green’s Dictionary of Slang

snotter n.

[SE snot; cf. snotterbox at snotbox under snot n.1 ]

1. the nose.

[UK] ‘Charley The Buzzman and Mot!’ in Flash Casket 67: The bulk look’d queer, the mot more rum / When Joey whipt up, to his snotter, his thumb.
[UK]Leaves from Diary of Celebrated Burglar 93/2: Wy, t’ blarsted leetle rat [...] ef I thowt that ’e wur a ‘nose’ and put t’ blokes awa’, I would punch ’is ‘sheeny’ snotter.
[Aus]D. Niland Big Smoke 47: The snotter you love to hit.
[Ire]S. Connaughton Run of the Country n.p.: Hit him on the snotter if he comes near you [BS].

2. a pickpocket who specializes in stealing handkerchiefs.

[UK]Hotten Dict. of Modern Sl. etc. 97: snotter, or wipe-hauler a pickpocket who commits great depredations upon gentlemen’s pocket-handkerchiefs.
[UK]Hotten Sl. Dict.

3. a (dirty, ragged) handkerchief; thus snotter-hauling, stealing handkerchiefs; a paper handkerchief.

[Scot]H. Clinker Hist. of the Haveral Wives (1799) 6: He has twa gilly gawkies o’ dochters wha [...] lug a wallopin white thing hinging like a snotter at a bubly wean’s nose.
[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 195: Wipe. A pocket-handkerchief [...] When this kind of article is in the last stages of consumption they scoff at it, as a snotter.
[UK] ‘Six Years in the Prisons of England’ in Temple Bar Mag. Nov. 536: You can make a fair thing by ‘snotter-hauling,’ even if you cannot get on at ‘fly-buzzing’.
[UK]M. Marples Public School Slang 163: snotter (St Edmund’s, Canterbury, 1870+), snot-rag (St Bees, 1915+) = handkerchief.
[UK]N. Griffiths Stump 199: Darren chucks the road map over his shoulder on to the back seat to join [...] the empty wrappers and flicked snotters.

4. (Ulster) a dirty, unpleasant person.

[Ire]Share Slanguage.

5. nasal mucus.

[Scot](con. 1980s) I. Welsh Skagboys 154: She birls roond tae me, blinded by snotters, rendered [...] repulsive.
[Scot]I. Welsh Decent Ride 106: Ah gits up n through, blawin ching n snotter oot ay ma beak.