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.
Insignificant or unimportant; minor.
(informal) Of little importance or value; insignificant, petty, inferior, etc.
A tin-pot dictator.
Origin of tin-pot
- Origin 1700s, from the low esteem for a tinker's wares.