A phrase originally meaning whenever someone can't stop obsessively thinking about
something or someone, particularly
something unimportant, or someone who isn't even remotely thinking about them in return.
However, due to overuse by morons, has come to just be a regurgitated, automated response to criticism of
something someone doesn't want criticized. Often used as a coping mechanism whenever an actual, intelligent rebuttal can't be made.
Person 1: "I don't like this restaurant. Every time I go there, the tables and chairs are
sticky and the service gets my order
wrong."
Person 2 (smugly believing they are somehow making a point): "Oh yeah? Well, that restaurant is living in your
head RENT FREE!!!"