gob1
¦ noun Brit. informal a person's mouth.
Origin
C16: perh. from Sc. Gaelic gob 'beak, mouth'.
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gob2
informal
¦ noun
1. a lump of a slimy or viscous substance.
N. Amer. a small lump.
2. (gobs of) N. Amer. a lot of.
¦ verb (gobs, gobbing, gobbed) Brit. spit.
Origin
ME: from OFr. gobe 'mouthful, lump', from gober 'to swallow, gulp', perh. of Celtic origin.