Is “Frumpiest” a Scrabble word?
Yes
FRUMPIEST
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 Frumpiest
adjective
1.Dowdy, unkempt, or unfashionable.
“She came to the door in a frumpy housedress and bedroom slippers.”
2.Bad-tempered.