trog, n. — Green’s Dictionary of Slang

trog n.

[SE troglodyte, a prehistoric cave dweller, loosely defined in sl. contexts as ‘the lowest form of human life’]

(orig. naut.) a general term of disdain.

1959		A. Sinclair Breaking of Bumbo (1961) 39: If the other Etonians now resented his authority over them, he seemed to be liked by the trogs.
1999		G. Seal Lingo 104: The following general terms of insult were in common use among [...] Sydney schoolgirls in the late 1970s: trog, dapto, mang, poonce (continuing an earlier usage) and nerd, the last being still in use with this age group.