Amalgamation of "texting" and "trolling". The action of scrolling through old text messages, especially through old hook-ups, with the plan of trying to get a NEW hookup going. Textrolls usually start with "Hey...was cleaning out some old texts and wondered how you were doing"...or "Hey! Long time..."
I just hooked up with Gina - the redhead from 6 months ago. I was textrolling on a bunch of old messages and she answered me.