Cockney rhyming slang, the traditional dialect of London's East End, may soon be "brown bread" as a younger generation struggle to decipher the famous sayings.
"Brown bread" means dead, for the avoidance of doubt.
A poll of Britons aged between 18 to 24 found that most were unable to identify the meaning of phrases such as "Donald Duck" (meaning luck), "Ruby Murray" (curry) or "bottle and stopper" (copper).
In fact a fifth of those taking the survey, conducted for cockney-influence tea brand Rosy Lee, thought "bottle and stopper" might be a reference to Burger King's Whopper.
Further difficulty was encountered with "Bobby More" (sure), "merry-go-round" (pound) and "Adam and Eve" (believe).
Older partcipants fared much better.
Footballer Bobby Moore, whose name is used to mean 'sure' in Cockney rhyming slang (Getty)
But in defence of those young people who were unable to identify the phrases, Cockney rhyming slang is purposefully elusive.
It originated in the 1840s and was likely intended to confuse listeners.
In many cases once the rhyme is established the second half of the phrase is dropped anyway, so for example "mince pies", meaning eyes, becomes "mincers", and "butcher's hook", meaning look, becomes "butcher's".
Cockney rhyming slang has also been affected by changing demographics, with language experts saying speech in the East End is increasingly reflecting West Indian and South Asian influences.
There have been efforts to preserve Cockney rhyming slang but perhaps its survival will come down to a matter of... "Donald Duck".
