A strange phenomena in which a person who is currently sending or reading a text is completely oblivious to the outside world and will not respond to verbal or physical stimuli made in their general direction. Will often evoke anger in people who are trying to talk to the texter.
Trudy: Someone just texted me...
Mark: Who was it Trudy?
Mark: Hey dickwad answer me *full hand slap in the face*
Cecilia: He won't answer you Mark, he's in a texting trance
Mark: I hate that cunt ass nigger bullshit
When someone is so deep in conversation via text messaging they are in a trance. Usually happens when figuring out plans with friends or texting about last night drunken escapades.
Guy 1: "I was out to lunch with my girlfriend today and she totally went into a texting trance, I had to shout her name for her to look up from her phone"
Guy 2: "who do you think she was talking to?"
Guy 1: "I don't know man, but she was giggling enough and and muttering about jello shots. She probably was retelling our crazy night last night *winks*
Guy 2: "who takes jello shots outside of college?"