LAHF
Laugh At His/Her Failure is when you mock someone so hard because their failure is so bad it makes you want to throw up.
He spilled his entire lunch on his shirt. LAHF like it was a crime scene.
She tried to dance and it looked like a robot had a seizure. LAHF like you were tortured.
He tried to sing and it sounded like a goat was screaming. LAHF like it was the apocalypse.