scat, n.⁴ — Green’s Dictionary of Slang

scat n.⁴

[? abbr. obs. SE scatterling, a vagrant, or Billingsgate fish market jargon scat, a man employed to push barrows]

an itinerant, a tramp.

1981

T. Wilkinson Down and Out 16: ‘You’ve seen the other scats on the station, haven’t you? ‘The other what?’ I said. ‘Itinerants.’.