noun

• (carpentry) A wooden block, the size of a brick, built into a wall, as a hold for the nails of woodwork.
  "Within a wall,[…], we find vertical studs, nogs or blocking, top and bottom plates, perhaps some form of diagonal braces, and many nailed and screwed connections."
• (archaic, carpentry, mining) One of the square logs of wood used in a pile to support the roof of a mine.
  "nogs and chocks are used to support the roof where waste material can not conveniently be obtained"
• (shipbuilding) A treenail to fasten the shores.

verb

• (transitive) to fill in, as between scantling, with brickwork.
• (transitive, shipbuilding) to fasten, as shores, with treenails.

noun

• (obsolete, especially Norfolk) A kind of strong ale.
  "Walpole laid a quart of nog on't He'd either make a hog or dog on't."

noun

• (offensive, derogatory, ethnic slur) A dark-skinned person; nig-nog.
• (Australia, dated, ethnic slur) A Vietnamese person.