When you hear someone near you fart and you blast out a much louder and more powerful fart in retaliation.
You walk in to wake your son up in the morning and hear him fart....you blast out the counterfart in return....son laughs "Ah Dad you won with that counterfart!"
by Vinny Liggio February 08, 2009
The act of covering up the smell of someone elses fart with that of your own, which is much more enjoyable (see odourgasm).
by Dudey McCool May 26, 2009