Green’s Dictionary of Slang

titty n.

[dimin. of tit n.2 (1); note earlier use as dimin. of SE tit, var. sp. of SE teat, meaning the nipple only]

1. [mid-18C+] (also tee-tee, tiddy) a woman’s breast; usu. in pl.

2. (also tittie) attrib. use of sense 1.

3. [20C+] milk.

4. [1920s] (W.I., also tittie, tittuh) a woman, as a term of address, lit. ‘sister’.

5. [1930s+] in fig. use, a source of nourishment; also attrib.

6. [1940s] (US) a woman.

In compounds

titty bar (n.) (also tittie bar)

[1980s+] (US) a striptease or lap-dancing bar.

titty bean (n.)

[2000s] a small or developing breast.

titty-bottle (n.)

[late 19C–1950s] a baby’s feeding bottle.

titty fuck

see under tit fuck.

titty girl (n.)

[2000s] (UK black) a consciously sexy young woman.

titty magazine (n.) (also titty mag)

[1990s+] (US) a (softcore) pornographic magazine.

titty oggy (n.)

[1960s] (US) intercourse in which the man rubs his penis between the woman’s breasts.

titty pic (n.)

a film, not actually pornographic, featuring bare female breasts.

In phrases

at someone’s titty (also on someone’s titty)

[1970s+] (US) dependent on someone (for money, work, protection, etc); thus off someone’s titty.

bump titties (v.)

[1990s+] (US black) to fight.

suck someone’s titty (v.) [SE suck; the image of dependency implicit in breastfeeding]

[1970s] (US) to depend on, to act as a parasite towards.

tough titty (also tough teaty, ...tiddy, ...tit, ...tits, ...titties) [var. on tough luck under tough adj.]

[1920s+] bad luck; thus tough tits, toots, a phr. of dismissal; also as n. (see cit. 2001).