An acryonym standing for "talk to you later". Used when someone is going to be absent or simply wishes to end the conversation. Other variations include ttyt (talk to you tomorrow), ttyn (talk to you never), and ttyw (talk to you whenever).
Aye bruh I have an early morning tomorrow, ttyl.
someone who is never going to talk to u later ever again
ok i gotta go ttyl
ok bye!
*5 years later*
i wonder where the went...
“talk to you later” a way to tell someone that you’ll simply talk to them later.
emma: ttyl!
kate oh okay, bye!!