Definition of "toby"

A drinking mug, in the shape of a human head with a hat atop; a Toby jug.  examples

(British, New Zealand) The valve that mediates the connection between a mains water-supply and a premises's own plumbing.  examples

(UK, dated, slang) The road or highway.  quotations

(US, dated, regional) A kind of inferior cigar of a long slender shape, tapered at one end.  examples

The Moorish idol, Zanclus cornutus  examples

Any of several species of pufferfish in the genus Canthigaster  examples