a whole new ball game

also a totally different ball game

a completely different situation, often one which is difficult or which you know very little about We'd done a lot of climbing in Scotland, but the Himalayas were a whole new ball game.

a whole new ball game

n. a completely different situation; something completely different. Now that you’re here, it’s a whole new ball game.

Common Names:

Name	Pronounced	Usage
Agape	-	Greek, Ancient Greek
Boniface	BAWN-ə-fays (English), BAWN-ə-fəs (English)	French, English (Rare)
Zhong	-	Chinese
Imogene	['imə.dʒi:n]
Antonina	ahn-taw-NEE-nah (Polish), ahn-tah-NEE-nah (Russian)	Italian, Polish, Russian, Ancient Roman
Rainier	-	French