Green’s Dictionary of Slang

snug n.

[SE snug, comfortable, cosy]

1. [early 19C+] (also snuggery) the bar-parlour of a public house or inn; also attrib.

2. [20C+] (US Und.) a small revolver that can be concealed easily.

SE in slang uses

In phrases

bit of snug (n.)

[late 19C] the vagina, in the context of sexual intercourse; usu. as give a bit of snug for a bit of stiff v., to have sexual intercourse (cf. bit of stiff under stiff n.1 ).