Top Definition
A list pane found on the right-hand side on the hompage of the Social networking site Twitter. It Shows the current most popular and talked-about topics on twitter. The ranking are in real time and are changed respectively.

Note: this can be collapsed and expanded
Guy: I got on twitter today and saw that Michael Jackson was finally off the trending topics

Girl: Only to be replaced by Chris Brown and Rihanna

Guy: So much for trending topics being the source of breaking news

Girl: yeah.... *sigh*
by deasmenc July 20, 2009
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