noun

• (countable) A lump of soft or sticky material.
  "1952, The Glass Industry, Volume 33, Ashlee Publishing Company, page 309, These inventors have discovered that gobs may be fed at widely spaced times without allowing the glass to flow during the interval but instead flushes out the chilled glass which accumulates during the dwell."
• (uncountable, slang) Saliva or phlegm.
  "He spat a big ball of gob on to the pavement."
• (countable, US, regional) A whoopee pie.

verb

• (slang, ambitransitive) To spit, especially to spit phlegm.

noun

• (UK, Commonwealth, Ireland, slang) The mouth.
  "He′s always stuffing his gob with fast food."

noun

• (uncountable, mining) Waste material in old mine workings, goaf.
  "This consisted in wheeling gob back to the most distant part of the stope and filling up the sets right up to the roof."