noun

• (East Anglia) A gull, especially the black-backed gull (Larus marinus); also spelled cobb.
  "Here is also the pica marina or seapye many sorts of Lari, seamewes & cobs."
• (Midlands) A round, often crusty roll or loaf of bread.
  "The cob was a cracknel or simnel made of fine flour."
• (uncountable) A building material consisting of clay, sand, straw, water, and earth, similar to adobe; also called cobb, rammed earth or pisé.
  "The poore Cotager contenteth himſelfe with Cob for his wals, and Thatch for his couering…."
• (obsolete) One who is eminent, great, large, or rich.
  "I ſaw fleſh bluddie toe ſlauer, / When the cob had maunged the gobets foule garbaged haulfe quick."

verb

• (of growing corn) To have the heads mature into corncobs.
  "Ninety Day came to maturity very early and cobbed plentifully, but the grain proved shallow and lacking in meal."

verb

• (Northern UK, colloquial) To throw, chuck, lob.
  "Well, sir, I’m sure I’d be rid of it fast enough if I could naut cob it away like a stoan."

noun

• (US, military) Initialism of contingency operating base.
• (military) Acronym of chief of boat.