Is “Plonker” a Scrabble word?
Yes
PLONKER
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 Plonker
noun
1.A fool.
2.A penis.
3.A man who sanctions sexual relationships between his girlfriend and his male friends.
Synonyms: mari complaisant, wittol