Pet peeve
A pet peeve, pet aversion, or pet hate is a minor annoyance that an individual finds particularly irritating to a greater degree than the norm. == Origin of the concept == The noun peeve, meaning an annoyance, is believed to have originated in the United States early in the twentieth century, derived by back-formation from the adjective peevish, meaning "ornery or ill-tempered", which dates from the late 14th-century.