The terrible itching and/or burning sensation between the cheeks of your ass from working in extreme heat, in wet clothes, or from not wiping your ass good enough. In other words, give it a second wipe.
by Hipstr67 May 12, 2016
The tiny, black, flying insects, usually seen in outhouses, that nip at your nuts and dart up your ass.
Upon returning from the latrine, David exclaims, "I just swallowed a Nipdart and I know it just flew off a log in the outhouse!"
by Hipstr67 May 12, 2016