Green’s Dictionary of Slang

boob n.2

[abbr. booby n.1 (1)]

1. [20C+] (orig. US, also boobist) a fool, an idiot.

2. [1900s–40s] (US) an inmate of a psychiatric institution.

3. [1910s-30s] (US tramp) an innocent, a potential victim of a thief.

4. [1940s+] an error, a blunder.

In derivatives

boobish (adj.)

[17C+] stupid, foolish.

In compounds

boob box (n.)

[1960s] (US) a psychiatric institution.

boob play (n.) [play n. (2)]

[1910s+] a foolish action, an error, a blunder.

boob trap (n.)

[1920s–60s] (US) a nightclub or similar place of entertainment where gullible customers are defrauded of their cash.

boob tube (n.) [tube n.1 (9)]

1. [1960s+] (orig. US) television; thus boob tuber, one who watches television a lot.

2. see also under boob n.3