hydraulic fart Share definition Flag The occurance of passing diarrhea or other liquid when farting, or passing gas. When a guy or gal sqeezes out a particularly squeaky or bubbly fart, one would say, aw' shit, I hope that wasn't a hydraulic fart! hydraulic fart by Rev Ron November 5, 2010 0 0 Get merch Get the hydraulic fart mug. Buy Now — $32.95 See more merch
