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1.
TTN
An infamous user on Wikipedia who enjoys destroying other people's work (especially pages about episodes of any television series)
Let's see what that episode was about, too late, TTN got to it.
by MrEvers December 17, 2007
 
2.
TTN
Trashy Teen Novel
That TTN was full of smut, but I loved it!
by bffjk March 26, 2009
 
3.
An acronym standing for "Time to Nut." The time it takes for a guy to bust his nut when having sex, usually timed in minutes.
"Wow, jerking off really helped me increase my TTN by at least 10 minutes while having sex with Veronica last night."
by johnny_s September 26, 2008