whatever float your boat

勝手にしたら、好きにしたら

Ex

• I didn’t know it, but whatever floats your boat.
• Whatever floats your boat. I don’t care.

Reference source

• http://englishclass.blog49.fc2.com/blog-entry-139.html
• https://xn--6oq618aoxf2r6an3hvha.jp/5360.html