Definition & Meaning of "cream crackered"in English

What does "cream crackered" mean in Cockney rhyming slang?

The structure uses the rhyming pair "cream crackered" to stand for "knackered" (British slang for exhausted), 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 exhausted or extremely tired. People typically say "I'm absolutely cream crackered after work" or "That hike left me cream crackered." The term originated in late 20th century London rhyming slang, drawing on the brand name of a common British snack cracker, and remains a humorous, well known example.