Wabi-sabi is a Japanese philosophy and aesthetic centered on finding beauty and depth in things that are imperfect, impermanent, and incomplete. But it got popularized from a famous scene in The King Of The Hill, in which a character says "I like how mine's a little off-centre — it's got wabi-sabi.", about a rose.
The scene is very wholesome and I've seen it refrenced plenty of times. Check out the clip if you can!

The title makes sense now lmao. He got that little wabi sabi