kì-tsǎi據在

to do as one likes

to do as one likes; to let someone do at one's convenience (to the other person)

English Wiktionary, “據在” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%93%9A%E5%9C%A8 · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)