look up any word, like the eiffel tower:
 
2.
#TBS is something no one needs to know about….It never happened…
Remember when I had loads of friends but now they fear for their lives and stay in all day because they witnessed a #TBS night?
by Steven 'TBS' Harvey June 10, 2011
 
1.
#tb
Hashtag throwback

Usually used when someone wants to post an old photo on Instagram and expects reactions such as "awe so cute"or "that was so great"
Me and my dog when I was five. #tb
by Tanhan naves November 17, 2013