ITMT-IP stands for I Think Magical Thinking Is Primitive. Which is used in the dating world to signify that you don't relate to personality tests. Referring mostly to Myers & Briggs' 16 Personality Types. It is mostly inspired by the book The Cult of Personality: How Personality Tests Are Leading Us to Miseducate Our Children, Mismanage Our Companies, and Misunderstand Ourselves by Annie Murphy Paul.
And serves as an excuse to get out of awkward conversations about personality tests.
I'm sorry I'm an ITMT-IP. We're a little bit special, crystals and alternative medicine don't work on us. They say it's because we have no personality.