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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?"

Mary: "tiem?"
Josh: "Sorry, TLTBS"
by Spunkasaurus May 31, 2010
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