Noun: Occurs when you're browsing on your phone at night, holding it in close proximity to your face, usually laying in bed- and a next message notifier / banner comes through and scares the living shit out of you, your heart skips a beat and you've had a text palpitation.
"Because our schedules were opposite, and yet we desired to chat more, we became textpals, texting each other several times a day but never having the chance to meet in person."