Green’s Dictionary of Slang

dew n.

1. [late 18C] vaginal secretions.

2. [mid-19C+] (Anglo-Irish/US, also dew-bowl) whisky, usu. illicitly distilled.

3. [1970s+] (US drugs) marijuana [ref. is to illegality, i.e. ext of sense 1, rather than any image of wetness].

4. [1970s+] (US gay) oily sweat exuded by the anus.

SE in slang uses

In compounds

dewbaby (n.)

[1970s] (US black) a very dark-skinned male.

dew-beaters (n.) [note Norfolk dial. dew-beaters, heavy, waterproof shoes]

1. [17C–early 19C] those who get up early, i.e. before the dew has evaporated.

2. [mid-18C–19C] (UK Und.) the feet.

dew-drink (n.)

[mid-19C] a drink served to farm labourers before they start work.

dewdrop

see separate entries.

dew-dusters (n.)

[19C] the feet.

dew-treaders (n.)

[19C] the feet.