Top Definition
The act of tricking another into believing that you will not fart on them, when indeed you do fart on them.
Ask your little brother to check the back of your pants for a stain, then rip a huge ass fart in the fucker's face.

person 1: "hey bro, can you check the back of my pants for a grass stain? I ate shit earlier."

person 2: "No problem, amigo."

person 1: (unloads massive flatulent)

person 2: ahhh, you fucking con fartist.
by El Kento March 05, 2011

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