What does "tinker" mean?

Tinker: One skilled in a variety of small mechanical work.

Additional senses

  1. 2.(Ordnance) A small mortar on the end of a staff.
  2. 3.(Zoöl.) (a) A young mackerel about two years old. (b) The chub mackerel. (c) The silversides. (d) A skate. [Prov. Eng.]
  3. 4.(Zoöl.) The razor-billed auk.
  4. 5.To mend or solder, as metal wares; hence, more generally, to mend.
  5. 6.To busy one's self in mending old kettles, pans, etc.; to play the tinker; to be occupied with small mechanical works.

Sources