The definition of tin-pot is someone who is unimportant.
An example of tin-pot used as an adjective is a tin-pot dictator which means a person who has very little importance.
Informal of little importance or value; insignificant, petty, inferior, etc.: a tin-pot dictator
Origin of tin-potfrom the relative cheapness of tin
Insignificant or unimportant; minor.
- Alternative spelling of tin-pot.
Origin 1700s, from the low esteem for a tinker's wares.