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1.
The act of throwing an NFL interception in the fourth quarter of a close game. This act will either lose the game and/or drastically change the momentum of the game thus resulting in a loss and very unhappy fans.
The Dallas Cowboys might make the playoffs with Kyle Orton if he does not thromo the ball!

Two minutes left, all we need is a drive to a field goal...nooOOOooo he thoromoed the ball!!
by Frustrated Dallas Cowboy Fan January 08, 2014
 
2.
a thromo is any homosexual who takes it in the throat.
You like using your throat? Don't be such a thromo!
by aevz May 13, 2013