The quality of being mean
smallmindedness, baseness, lowness, pettiness, wickedness, debasement, degradation, abjection, shamelessness, infamy, degeneracy, blackguardism, knavishness, unscrupulousness, stinginess, closeness, niggardliness, frugality, churlishness, corruptness, cupidity, sordidness, contemptibleness, disrepute, rapacity, malice, iniquity, malignity, unworthiness, ill-temper, unkindness, covetousness, avarice, miserliness, parsimony; see also greed.
Antonyms generosity*, nobility, worthiness.
A mean action
belittling, defaming, groveling, cheating, sneaking, quarreling, scolding, taking advantage of, deceiving, coveting, grudging, grasping, dishonoring, defrauding, perjuring, shaming, degrading, beggaring, stealing.