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1.
A word used to call someone who usually gets into a conversation among friends in which the friends do not want in the conversation.
Group of people: Yea that dude is a total flamer...
Person A:*creeps into the group*
Group of people: stop trooting you fagot, gtfo.
Person A:*sad face*
by moemannn October 17, 2010
 
2.
From Television Rooting. Rooting for your favorite sports team on TV when you can't be at the game.

While trooting has no effect on team morale or energy, it is practiced religiously by fans in sports bars and living rooms everywhere. Trooting may also contain more profanity than ordinary rooting, depending on the venue.
The guys down at Paddy's Bar were all trooting for the Bulls to win.
by Tuftskins April 30, 2009