The act of providing sexual connotations or inferences in the form of text.
"Did you see that email? That girl was text fucking the shit out of you."
"Read between the lines dude, she's definitely text fucking you."
A person who text messages someone non stop for a period of time to the point it becomes annoying to others around them because there phone rings with a new text message every 30 seconds.
Johns phone keeps on ringing with a new text message every so often, so Ryan asks him who he is Text Fucking.