noun--A non-professional person skilled at mechanical or electrical inventions and/or repairs.
verb--To engage in minor repairs or inventing.
John's an excellent tinker; he got my lawn-mower running in ten minutes.
John's always tinkering. His latest widget gets my mail and throws away the ads.
Although usually meaning Irish travellers can also be used to refer to someone dirty or unhygenic in appearence or smell...
Me: Oh, whats that smell?
Friend: Its that tinker over there!
Me: What a dirty smelly tinker!
A very loose term that is interpreted in your own way, but most commonly used to describe a person who is cheeky or funny.
A small limp dead penis that can't be used for nothing.
What's wrong with your penis?
Penis, it's a tinker
What's a tinker?
A small limp dead dick
When I woke up Natalie pulled a tinker out of the corner of my eye.
turn signal on an automobile
Put your tinker on when merging in to the other lane.
The phonetic pronunciation of the acronym T.N.C.R. (which stands for Triple Digit Class Rank). A name used to classify a graduate student (usually a medical student) that used to be a gunner, a student who would do anything to succeed; however, once the student got to school and realized how hard it was the changed their minds and decided "passing" was just fine with them.
Man, before i got here i was sure i was going to be a gunner but after my first test I became a tinker for sure.