Is “Flack” a Scrabble word?
Yes
FLACK
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 Flack
/flæk/
verb
1.To flutter; palpitate.
2.To hang loosely; flag.
3.To beat by flapping.