barn burner: can also refer to an epic and overpowering flatulent expulsion that smells so vomitous and full of vile toxic fumes that you swear could burn down or melt an actual man-made structure
Farmer: WHEW!! MAN ALIVE what is that horrid stench? Please tell me you didn't feed those cows spinach again?
Cow-hand: *holding his nose* No that was me - I've been holding in my grandma's hogmaw beancakes in for weeks!