OBL
You explode with laughter so hard you might bust a gut. Used when something is so stupidly funny it makes you look like a fool for not laughing harder.
My dog ate my homework and then did a backflip. I OBL'd in the hallway.
She told the same joke three times. I OBL'd so hard I got a headache.
He tripped into a cake. I OBL'd so loud the neighbors called the cops.