A person who willingly takes the blame for a fart when it wasn't theirs, especially to protect the true farter from suffering unbearable embarrassment.
I was with Julie at her swearing in ceremony when she ripped a thunderclap. I quickly became a fartyr for her!
A Fart Martyr. Someone who, in the company of others, holds in a fart, causing themselves immense discomfort in order to spare the tastebuds of those around them.
Dramon: I went out with Beccy again last night, saw that new Tarantino movie.
Rick: For real. That shit worth seeing?
Dramon: I dunno man, all I remember is holding in the biggest booty coughs for three damn hours. That shit damn near killed me. Shouldn't have had those burritos for lunch dog.
Rick: Just let that shit out man. No point tryna be some kind of Fartyr. Release and deny bro, release and deny.
Joseph was made a fartyr of by Bryan to avoid embarrassment on a first date. Joseph accepted this because Bryan was his nigga.
Someone who takes the blame for someone else's fart
John knew his wife had ripped an awful fart at the dinner party, and when Dave noticed and called attention to the awful odor, John decided to be a fartyr by apologizing and saying it was he that had farted. FartFartyrMartyrFlatulence