Is “Giddap” a Scrabble word?
Yes
GIDDAP
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 Giddap
interjection
1.(directed at a horse) Move on!, go faster!
Synonyms: gee up