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1.
Laughing Too Hard, Can't Breath
Can also be spelled LTH,CB

Usually used when you are laughing at a joke but do not wish to say ROTFLOL.
P 1: I did a stupid.
P 2: What?
P 1: Tripped down the stairs and landed on my face.
P 2: LTHCB
by Ballooner September 27, 2011