Green’s Dictionary of Slang

gob n.1

[orig. northern dial.]

1. [mid-16C+] (orig. UK Und., also gub) the mouth.

2. [late 19C-1900s] (US) a verbose individual.

3. [mid-19C+] verbosity.

4. [late 19C] the face.

5. [1960s] a blow to the mouth.

In compounds

gob-box (n.)

[late 18C–early 19C] the mouth.

gob-crockery (n.)

[1980s] (Aus.) false teeth.

gob-iron (n.)

[1950s+] a mouth organ.

gob-job (n.) [job n.2 (2)] [1980s+]

1. fellatio.

2. (US gay) fellatio performed on a sailor [adds pun on gob n.2 (4a)].

gob-lock (n.) [SE lock; their inarticulacy]

[1990s+] a fool.

gob off (v.)

[2000s] to talk (loudly).

gob-organ (n.)

[1930s] (Aus.) a mouth-organ.

gob out (v.)

[early 19C] to talk.

gobshite (n.)

see separate entry.

gobsmacked (adj.)

see separate entry.

gob-stick (n.)

1. [late 18C–19C] (US) usu. pl., (silver) forks or spoons.

2. [1920s–50s] (orig. US, also gobblestick) a clarinet or fife.

In phrases

blow one’s gob off (v.) (also blow one’s gab off) [gab n.1 ]

[1910s] to lose one’s temper.

shut (up) one’s gob (v.) (also shut one’s gab, stop one’s gob) [gab n.1 ]

[20C+] to be quiet; esp. in imper. shut your gob!

tip (someone) the gobbox (v.)

[mid-19C] to abuse, to tell off.