Acronym for "Too lazy to back space." Occurs when you misspell something on the interwebs, usually in a chat program or IM window, and don't feel like lifting your fingers to click the mouse to the error or to backspace all you've written to correct it.
Mary: "Let's go to the movies tonight"
Josh: "Okay, what tiem would you like to go?"
According to "carmeldancingshoes97",
you are so wierd rara i do non't even want to talk to you so talk to you so tttbcthod ha i bet you don't even now wat that mean and don't come over to my house because i'll tell ethan to close the door on you