haha j/k! - This is when people say stupid stuff just to make you think

This is when people say stupid stuff just to make you think they're cool and not total garbage.

Hey bro, I'm gonna fail this test, haha j/k! (He got a D-.)

You're gonna die in the hospital, haha j/k! (He got hit by a bus.)

I'm gonna eat your face, haha j/k! (He ate a whole pizza.)