Snack

·vt A slight, hasty repast.

II. Snack ·vt A share; a part or portion;

— obsolete, except in the colloquial phrase, to go snacks, ·i.e., to share.

snack
A share. To go snacks; to be partners. ...

Dictionary of The Vulgar Tongue by Francis Grose
snack
a dried fungus, used as tinder. Glouc. To go snacks, or snack it, to go shares, or partake. ...

A glossary of provincial and local words used in England by Francis Grose