Definition & Meaning of "Barney Rubble"in English

What does "Barney Rubble" mean in Cockney rhyming slang?

The structure uses the rhyming pair "Barney Rubble" (the character from The Flintstones) to stand for "trouble," following the typical Cockney pattern of replacing a word with a phrase that rhymes with it. It is used in Cockney rhyming slang (London, UK) to mean trouble, a problematic situation, or difficulty, often shortened to just "Barney." People typically say "You're looking for Barney Rubble" or "He got himself in a bit of Barney." The term originated in mid 20th century London rhyming slang, drawing on the popular cartoon character, and remains a recognizable if somewhat dated example.