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A low pitched howling noise someone with IBS makes when they are feeling some kind of discomfort, often emotional. It can also be used to accentuate a sentence with little to no effect. The noise can be be best described as the sound that a dinosaur would make when hit by a train.
1: Zack: Joe, you're retarded.

2: Mark: Man, I'm awesome at this HHNNNNGGGGG.
Jack: Nice Irritable Bowel Howl, there.
by srj1224 February 03, 2010
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