Noun
A small piece or silver of skin which hangs loose, near the root of finger nail.
Source: Webster's dictionaryIf you really want to upset a witch, do her a favor which she has no means of repaying. The unfulfilled obligation will nag at her like a hangnail. Terry Pratchett
I am not religious. I do not believe that personhood is conferred upon conception. But I also do not believe that a human embryo is the moral equivalent of a hangnail and deserves no more respect than an appendix. Charles Krauthammer
By the same logic, if you have a hangnail, cut off your hand. Source: Internet
Reasonable people can disagree on what the best system might be, but to suggest the problems of the current system as a mere hangnail -- to me that just sounds very out of touch. Source: Internet