Green’s Dictionary of Slang

grubbing n.1

[grub v.1 (1)]

eating; also attrib.

[UK]‘One of the Fancy’ Tom Crib’s Memorial to Congress 28: What with snoozing,† high grubbing,‡ and guzzling like Cloe [notes] † Sleeping. ‡Feeding.
[Aus]Bell’s Life in Sydney 24 Oct. 2/2: Arriving at the grubbing ground we were pleased to notify the exactness of the [...] caterer’s design.
[UK] ‘’Arry on Angling’ in Punch 30 July 45/1: The ’ole thing seemed swell with good grubbing and lots o’ prime lotion chucked in.
[US]S. Lewis Arrowsmith 459: Is this going to be just a homey grub-grubbing or a real soiree?

In compounds

grubbing-crib (n.) [crib n.1 (1)]

a cookshop; thus grubbing-crib fencer, the proprietor of an eating house.

[UK]Kendal Mercury 3 Apr. 6/2: Vy, he’s second to no tyke on the pad for progging (stealing meat); ye should see him with a dollop of bee’s-wax (cheese) from a grubbing crib (provision store).
[UK]Hotten Dict. of Modern Sl. etc.
[UK]Hotten Sl. Dict.
[UK]Leics. Chron. 17 May 12/2: It’s a first-rate grubbing ken.
grubbing utensils (n.)

the fingers.

[UK]Bell’s Life in London 7 May 3/2: January, like his namesake [...] took the lead [...] cracking the pieman’s crust in a style which completely deranged the economy of his grubbing utensils. The pieman was overdone [...] having both ogles completely shut up.
grubbing place (n.)

a restaurant, a café.

[UK] ‘’Arry in Parry’ in Punch 29 June in P. Marks (2006) 95: And enough grubbing places [...] to feed ’arf a town.