noun: a fake or false fart
verb: pretending to fart by making loud, fart-like sounds by various methods including but not limited to mouths and/or hands, arms, or armpits.
Three guys at a party, standing in the hallway. One goes in the bathroom and soon really loud fart-like sounds begin.
First guy looks at the second and says, "oh dude, he's..."
Second guy interrupts, "No man, fartificial."
Kate was so embarrassed when her Mom came to visit and Brad thought it'd be funny to go in the bathroom and fartificial.