tinker

(noun) a person who enjoys fixing and experimenting with machines and their parts. Synonyms: tinkerer.

(noun) formerly a person (traditionally a Gypsy) who traveled from place to place mending pots and kettles and other metal utensils as a way to earn a living.

(noun) small mackerel found nearly worldwide. Synonyms: chub mackerel, Scomber japonicus.

(verb) do random, unplanned work or activities or spend time idly. Synonyms: putter, mess around, potter, monkey, monkey around, muck about, muck around. Examples: "The old lady is usually mucking about in her little house."

(verb) work as a tinker or tinkerer.

(verb) try to fix or mend. Synonyms: fiddle. Examples: "Can you tinker with the t.v. set--it's not working right." "She always fiddles with her van on the weekend."