RhymeZone: tiddy definitions

Definitions of tiddy:

noun: (UK, dialect) The European wren.
noun: A minor river in south-east Cornwall, England, which joins the River Lynher.
adjective: (UK, informal) Alternative form of diddy (“very small, tiny”) [(UK, informal) very small, tiny]
noun: (humorous, vulgar) Alternative spelling of titty (“breast”) [(slang, vulgar) A breast.]

(Definitions from Wiktionary)