Green’s Dictionary of Slang

dive n.1

(UK Und.)

1. [early 17C–19C] (also dives) a pickpocket; an act of pickpocketing [dive v. (1)].

2. [late 18C–early 19C] a thief who stands outside a house or shop, inside which is a small boy who throws out goods that have been stolen [? he dives to catch the falling goods/the goods ‘dive’ from the window].

3. [1910s+] (orig. US, also diveroo) the voluntary losing of a fight by a boxer, presumably at the behest of a criminal bettor [he ‘dives’ to the canvas].

In phrases

take a dive (v.) (also dive) [one lit. + fig. dives to the canvas] (orig. US)

1. [1910s+] (also high-dive) in boxing, or any competition, for a fighter deliberately to lose a fight (cf. go in the tank under tank n.1 ).

2. (Aus.) to plead guilty.

3. [1950s] to faint.

4. [1980s+] to fail.

take the high dive (v.)

[1900s] to make a bet.

SE in slang uses

In phrases

do a dive into the dark (v.) (also make a dive in the dark)

[late 19C+] to have sexual intercourse.