Is “Blab” a Scrabble word?
Yes
BLAB
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 Blab
/blæb/
noun
1.One who blabs; a babbler; a telltale; a gossip or gossiper.
2.Gossip; prattle.
verb
1.To tell tales; to gossip without reserve or discretion.