Green’s Dictionary of Slang

pit n.

1. [mid-16C+] (also sawpit) the vagina.

2. [late 17C–early 19C] (UK Und.) the common grave, beneath the gallows, in which those who fail to pay a burial fee of 6s 8d are buried after their remains have been cut down.

3. [early 19C+] a breast pocket; thus (UK Und.) pit-worker n., a pickpocket who specializes in robbing inside pockets.

4. [late 19C+] (UK Und.) a wallet [from sense 3].

5. [1940s+] as a place, usu. untidy, dirty.

(a) a bed.

(b) a real mess, esp. a room that is untidy.

(c) an unattractive, unpleasant place.

6. [1950s+] (orig. US) in fig. use, as the pits.

(a) a situation, object or person seen as totally undesirable.

(b) the depths of despair; thus in the pits, very depressed.

7. [1950s+] an armpit, with an implication of body odour; usu. in pl.; thus the pits, body odour.

8. [1960s] (drugs) the place on the inside of the elbow that is often used for injections.

9. [1960s+] (orig. US) a pit bull terrier [abbr.].

In derivatives

pitty (adj.)

[1970s+] (US campus) messy, untidy, disgusting.

In compounds

pit-hole (n.)

1. [17C] hell; a grave; thus pit-holed adj.

2. [19C] (also pit mouth, pit of darkness) the vagina.

pit job (n.) [job n.2 (2)]

[1960s] intercourse in axilla, i.e. beneath the armpit.

pit-man (n.)

1. [19C] a small pocket-book, worn in the inside pocket of a jacket.

2. [1900s] (US Und.) a front trouser pocket.

In phrases

hit the pit (v.)

1. [1960s] (N.Z.) to go to bed.

2. [2000s] to inject a drug.