i will break ur kneecaps UwU

I will break ur kneecaps UwU is a term created to confuse and stun the person it is said to.

person : i dislike this.

other guy: i will break ur kneecaps UwU

person: ................ wtf

Meaning:
UwU is a "cringey" term for innosense. but however if you put something weird, it is taken a different way lmao.