Green’s Dictionary of Slang

third adj.

SE in slang uses

In compounds

third beer (n.)

[2000s] (N.Z.) a woman, generally, a girlfriend, who is considered plain and unexciting.

third degree

see separate entries.

third eye (n.) [-eye sfx]

[20C+] (US) the anus.

third leg (n.)

[mid-19C; 1970s+] the penis.

third rail

see separate entries.

third sexer (n.) [SE third sex, homosexuality, coined by sexologist Magnus Hirschfeld (1868–1935)]

[20C+] (US) a homosexual.

third-tierer (n.)

[mid–19C] (US) a prostitute who cruised the third tiers of theatres.

third-world briefcase (n.) [SE third-world, i.e. non-white]

[1980s+] a large portable stereophonic tape deck/radio, particularly popular among black youths in the US and UK.

In phrases