Is “Blabber” a Scrabble word?
Yes
BLABBER
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 Blabber
/ˈblæb.ə(ɹ)/
noun
1.A person who blabs; a tattler; a telltale.
verb
1.To blather; to talk foolishly or incoherently.
2.To blab; to reveal a secret.
3.To stick out one's tongue.