A chronic illness contracted by someone who thinks that the world revolves around them.
"That girl has no consideration for anyone. All she cares about is herself"
"Relax bro she can't help it. She has Gravititus."
"Oh man no wonder. Thanks for the warning."
The invisible force that prevents you from moving when there's a cat on you. This force, likenormal gravity, increases exponentially with the cat's proximity to your center of mass. Measured in meowtric tons.
I should have gone to the store today, but I was pinned to the couch by gravkitty.