to one's heart's content, as much as one likes

Explanation

Kimchi Reader

to that capacity’s fullest extent.

Examples
주말에는 마음<span class='focus'>껏</span> 쉬고 싶어요.
I want to rest to my heart's content on the weekend.
시험이 끝났으니 이제 마음<span class='focus'>껏</span> 놀 수 있어요.
Now that the exam is over, I can finally play as much as I want.
오늘은 힘<span class='focus'>껏</span> 달려 봐요.
Let’s run as hard as we can today.

3 more sentences in the app — free account.