"Talk To You Later," used in text messages between a couple involved in an extramarital or otherwise secret romantic relationship where the sender does not wish to make the relationship's existence public knowledge, as doing so could have marital, employment or legal consequences for the sender.
A quick way to abruptly cut a conversation short, "ttyl" is along the lines of the police command, "Maintain radio silence," and it's loosely translated as, "My spouse/family/co-workers/friends are here. Do not send me anything else."
It is unspoken but understood that the receiver will simply stop and wait for something else from the sender.
In the conversation below, dessert
refers to casual sex after dinner. Whipped cream optional.
Her: Hey, babe, he's gone tomorrow AM for 2-3 days. Kids at grandparents. Dinner & dessert
Him: I'm in. Wherever you want. Ideas?
Her: Been to that new French place on main? Heard it's yum and very romantic. He's coming up driveway.
Him: Perfect. Dessert
at my place.
Her: God, yes, please, I SO need dessert
Him: Honey, I'm ready for dessert
too. I want to eat as much as I can.