Is “Cockneyism” a Scrabble word?
Yes
COCKNEYISM
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Cockneyism
noun
1.The characteristics, manners, or dialect of a Cockney.
2.A Cockney phrase or idiom.