Green’s Dictionary of Slang

trigry-mate n.

[SE trig, to walk briskly + SE mate; they are both people with whom one walks around]

1. an idle woman companion.

c.1698
170017501800
1823
[UK]B.E. Dict. Canting Crew n.p.: Trigry-mate an idle She-Companion.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. an intimate friend.

[UK]Farmer & Henley Sl. and Its Analogues.