Is “Giddyup” a Scrabble word?
Yes
GIDDYUP
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 Giddyup
/ˈɡɪdɪˌʌp/
verb
1.To cause a horse or similar mount to speed up.
2.(by extension) To start moving or move faster; to get a move on.
interjection
1.(directed at a horse) Move on!, go faster!
Synonyms: gee up