Flailing years
Since the 18th century, the period of "adolescent immaturity, puberty " has been colloquially referred to as flail years, which begins between the ages of 9 and 14 for European girls and between 10 and 15 years for boys. The term is derived from "boozy" or "boozy" (evidenced since the 17th century in the sense of "gross naughtiness" or "naughty, rough") and alludes to the fact that young people of this age have considerable mood swingscan be subject to and are at times mentally unbalanced, so that serious arguments with parents and other adults occur more often than before. Adults often perceive this increased level of independent thinking and will of young people, which is unfamiliar to them, as disrespectful, inappropriate and excessively aggressive and therefore rejected as “boorish” (documented in this form since the 19th century).
Flegel ( Old High German flegil , occupied since the 10th century) is a loan word from the Latin derived from the flagellum (the scourge ) because the Germans the threshing with flails only by the Romans met. As a swear word ("peasant flail"), the term was initially used by the rulers for the peasants because of their typical work tools.