A burn on you

[Chicken Sandwich]

I was just watching "The Big Bang Theory" and this bit of dialogue came up:

Stuart: You guys still on for bowling tonight?
Sheldon: Oh, yes. In fact, I've prepared
some trash talk for the occasion. Ahem. You bowl like your mama. Unless she bowls well. In which case, you bowl nothing like her.
Stuart: Oh. Ouch.
Sheldon: That is what is referred to
as "a burn on you."

What is a burn on you? Did he made that up? I know what a burn is, but does this have some kind of a non-literal meaning that perhaps I'm nog seeing?

[SoothingDave]

A "burn" is slang for a comedic putdown (insult) of another. Used among friends.