1. to alert and/or notify someone via text message (hence text + notify = textify).
2. To spill your guts over a text message, usually something along the lines of liking someone and wanting to date them, or revealing something too disgusting/embarrassing to say in person.
1. I had to textify Johnathan at the last minute that I would not be in attendance at his party.
2. OMG, Jimmy just textified Susan that he gave her sister a cleveland steamer at last year's Christmas party!