In my bio, I currently describe myself as "one cat short of 'crazy cat lady'". Exactly how many cats does it take to make a crazy cat lady? I'm glad you asked!
It's actually a very complicated math formula. It's based on income*, available space for litter boxes**, the number of people (hands for petting) available in the house, and how many cat you currently have. (Notice I don't say "own", since cats own you, not the other way around.)
In my case, I have not reached crazy cat lady status, because I have one less cat than crazy cat lady status requires. The really nice thing about this formula is that I will *always* have one less cat than crazy cat lady status, no matter how many cats I have.
*Income: if you have more cats than you can afford to care for, use the variable X. If you make more than 100,000 a year, use the variable Y. If you make more than 100,000 a year, and you have more cats than you can afford, use the variable "Certified Crazy Cat Lady".
**Crazy Cat Ladies tend to have their cats be indoor cats. Indoor cats live 12+ years, while indoor/outdoor cats tend to live less than four.