Green’s Dictionary of Slang

boob n.3

[bub n.4 but note earlier booby n.2 ; since 1970s one of the terms esp. favoured by women]
[1930s+] (orig. US)

1. the female breast, usu. in pl.

2. the chest of a fat male.

In derivatives

In compounds

boob job (n.) (also tit job) [tit n.2 (1) + job n.2 (2)]

[1970s+] cosmetic/plastic surgery on the breast, usu. for enlarging with some form of implant.

boob tube (n.)

1. [1970s+] a woman’s tight, strapless top, usu. of knitted or elasticated fabric.

2. attrib. use of sense 1.

3. see also under boob n.2