burst out laughing

burst in

to enter suddenly and unexpectedly

burst into tears

To suddenly start crying or sobbing.

burst someone's bubble

To disillusion; to disabuse someone of a false notion or rationalization that has grown comfortable.

last burst of fire

A final effort, a final attempt before stopping.

laughing stock

An object of ridicule, someone who is publicly ridiculed; the butt of a joke.

laughing tackle

Teeth.