nog UK /nɒɡ/US /nɑɡ/noun 8verb 2forms 3 noun8 •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. — 2014 •Abbreviation of eggnog. •(offensive) A dark-skinned person; nig-nog. •Short for noggin. •A treenail to fasten the shores. •(offensive, old-fashioned) A Vietnamese person. •(no longer used) 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 — 1903 •(no longer used) A kind of strong ale.Walpole laid a quart of nog on't He'd either make a hog or dog on't. — 1723 verb2 •to fill in, as between scantling, with brickwork. •to fasten, as shores, with treenails. formsnogged · nogging · nogs