1.a person who enjoys fixing and experimenting with machines and their parts
2.an itinerant Gypsy
3.a traveling repairman who mends broken things (such as metal household utensils)
4.small mackerel found nearly worldwide
1.do random, unplanned work or activities or spend time idly;
The old lady is usually mucking about in her little house
2.work as a tinker or tinkerer
3.try to fix or mend;
Can you tinker with the T.V. set--it's not working right