gob
n. countable C2 Proficiency US //ˈɡɑb// UK //ɡˈɒb// gob
n. a mouth, or a wet lump of something like spit. It is a very informal word that can sound a bit rude or dirty depending on how you use it.
n. a mouth; also refers to a lump or clot of a slimy substance, such as phlegm or saliva. Primarily British and Australian slang; often carries a crude or impolite tone.
He told the noisy man to shut his gob.
The worker spat a large gob of phlegm onto the pavement before continuing his walk.
Usage
Informal and often considered crude; 'shut your gob' is a common but impolite way to tell someone to be quiet.