be sitting pretty
US /bi ˈsɪtɪŋ ˈprɪti/
UK /bi ˈsɪtɪŋ ˈprɪti/

1.
安泰に過ごす, 良い状況にある, 恵まれている
to be in a very good or advantageous situation
:
•
After winning the lottery, she's sitting pretty for the rest of her life.
宝くじに当たって、彼女は残りの人生を安泰に過ごすだろう。
•
With his new promotion, he'll be sitting pretty with a higher salary and more benefits.
新しい昇進で、彼はより高い給料と多くの手当で安泰だろう。