fartyadj.

1965 M. Shadbolt Among Cinders xxv. 250 On all the tables there were farty little candles stuck in brown bottles.

1973 D. Leitch God stand up for Bastards xiv. 224 This bloated plastic bag, which had all the aesthetic appeal of a giant contraceptive, emitted a squelching, farty noise.

1983 New Society 21 July 101/3 It [sc. mud] stinks, a fishy, farty smell of methane and rotted fish.

1994 B. A. Staples Parallel Time v. 63 The odors that seemed to drift up from the river were worse than farty; they were evil.

2016 Sportsman (Austral.) (Nexis) 16 July 41 Brussels sprouts are delicious, texturally interesting if cooked the right way, full of good stuff that makes you healthy (and yes, a bit farty).