- 开怀大笑 kāihuáidàxiào to laugh heartilyto laugh one's heart out; to laugh heartily and unrestrainedly
- 开怀畅饮 kāihuáichàngyǐn to drink to one's heart's contentTo drink wine or alcohol freely and with great enthusiasm; to enjoy a drinking bout with an open heart.
- 开怀儿 kāihuáir to one's heart's contentTo one's heart's content; to do something with full joy or without restraint.