english
1
general::
Tested and proved to be worthy or reliable, as in Let me deal with it? my method is tried and true. [Mid1900s]
American Heritage Idioms
2
general::
Phrase(s): tried and true trustworthy; dependable. (Hyphenated before nominals.) • The method I use to cure the hiccups is tried and true. • Finally, her old tried-and-true methods failed because she hadn’t fine-tuned them to the times.
McGrawhill's American Idioms And Phrasal Verbs