haha j/k! - This is like when people lie to you just to seem like they'r

This is like when people lie to you just to seem like they're not the worst person in the world.

I’m gonna fail the test, haha j/k! (He failed the test.)

I’m gonna eat your face, haha j/k! (He ate your face.)

I’m gonna beat you up, haha j/k! (He beat you up.)