Green’s Dictionary of Slang

1. (Scot.) to have sexual intercourse with a woman.

1984

Partridge DSUE (8th edn) 1102/2: from ca. 1810.

2. (Scot. Und.) to snatch, to pickpocket.

1821

D. Haggart Autobiog. 16: Young M’Guire snib’d the lil, and passed it to Barney, who made off.