G.T.I.S.
G. T. I. S. is when your titties get so tickled by your laugh you think you’re going to lose them. It’s the text version of a full-blown titty riot.
G. T. I. S. My dog tried to eat my math test.
G. T. I. S. I got a D on my spelling test and it’s all your fault.
G. T. I. S. My cat pooped on my brand new shoes.