noundialect, historical Scottish, Irish, British
A person who makes a living by mending pots and other metal household utensils, especially on an itinerant basis; a tinker. Also (chiefly derogatory): a Gypsy or other person living in an itinerant community; a disreputable person.
Middle English; earliest use found in Regesta Regum Scottorum. Either (i) a variant or alteration of tinker.
1Something which makes a tinkling sound, especially a small bell (sometimes as an affectionate or colloquial name), or an ornament (often one of a number of such ornaments) suspended in such a way as to make a tinkling sound when moved.
Occasionally (and in earliest use): a base coin.
2A person who tinkles.
Late 16th century. From tinkle + -er.