A Definition for Curmudgeonhood
1. archaic: a crusty, ill-tempered, churlish old man.
2. modern: anyone who hates hypocrisy and pretense and has the temerity to say so; anyone with the habit of pointing out unpleasant facts in an engaging and humorous manner.
Taken from Jon Winokur, The Portable Curmudgeon (New York: NAL Books, 1987).
Comment: (1) should be avoided; (2) should be embraced by those who can withstand it.