That Is Lame. Used when you find something lame.
Example 1:

Guy 1: Hey man i just lost a dollar
Guy 2: Jeez, TIL

Example 2:

Guy 1: Why did the monkey eat oranges?
Guy 2: Why?
Guy 1: Because he's a monkey!
Guy 2: TIL
by The Vizard November 11, 2010
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opposite of lit

whack or lame
"I went on a date with this guy and he was on his phone the whole time. He was til as fuck"
by unicornwatch May 18, 2016
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