when u try to do a fake fart, and it doesnt work, u have unintentionaly created a fart nut( when u shit in your pants and leave an annoying turd stain)
he was trying to be funny, but all he got was a fartnut
A practical joke in which the trickster places a fan, typically oscillating, near the person to be tricked. The trickster then walks by and farts into the fan thus blowing a not so fresh breeze of ass stink all over the victim.