1: insider code giving another guy a warning about a female, more specifically about her propensity to be a crazy cat lady

2: cautionary statement about a female who is less dateable than advertised due to a prolonged stretch of romantic inactivity (which leads to clinginess)

Also note that x increases with a particular girl's level of insanity, and can thus be used as a measure of how much caution should be warranted in attempting to approach her.