tinker

Short definition from Wiktionary

Noun

1. 1
   An itinerant tinsmith and mender of household utensils made of metal.
2. 2
   A member of the Irish Traveller community or of other itinerant groups; a gypsy.
3. 3
   A mischievous person, especially a playful, impish youngster.
4. 4
   Someone who repairs, or attempts repair, on anything mechanical, or who invents such devices; one who tinkers; a tinkerer.
5. 5
   An act of repair or invention.
6. 6
   A hand mortar.
7. 7
   Any of various fish: chub mackerel, silverside, skate, or young mackerel about two years old.
8. 8
   A bird, the razor-billed auk.

Verb

1. 1
   To work as a tinker.
2. 2
   To fiddle with something in an attempt to fix, mend or improve it, especially in an experimental or unskilled manner.

Proper noun

1. 1
   A northern English surname originating as an occupation for someone who mends pots and pans.