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grub
worker(s) on a trade union organised workplace who are not members of the union but benefit from the conditions negotiated by the union: Those grubs are not even members but they take the payrise every year.
Contributor's comments: In Calen, a grub is an outsider, someone not from Calen who turns up here. When the local boatramp is full of cars from town, it's full of grubs. "You should have seen the grubs at the ramp today!"