gob (n.1)

"a mouthful, lump," late 14c., from gobbet.

gob (n.2)

"mouth," 1540s, from Irish gob "mouth," and thus related to the other English noun gob (also see gobbet). Gob-stopper "type of large hard candy" is from 1928.

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Definitions of gob from WordNet

gob (n.)
a man who serves as a sailor;
Synonyms: mariner / seaman / tar / Jack-tar / Jack / old salt / seafarer / sea dog
gob (n.)
a lump of slimy stuff;
a gob of phlegm
gob (n.)
informal terms for the mouth;
Synonyms: trap / cakehole / hole / maw / yap