unusual (as in departing from the standard or norm) adj.: heteroclite

Their mother was severely authoritarian. It is often from such repressive origins that rebels arise. “You have to assassinate your parents” was Philippe’s advice to the young. He did it by running away to join the Foreign Legion. He attended, off and on, a suspiciously heteroclite array of schools before graduating with a degree in foreign languages from the Sorbonne. (James Kirkup, Obituary: Philippe Leotard, Independent, 08/28/2001, p. 6.)

[The town of Antelope, Oregon] held a modest population of about 40.  Conversely, there were hundreds of Rajneeshees, and more were coming. … Rajneeshees may have imagined themselves as proactive citizens. To Antelopians however, they were an invasion of sex-mad heteroclites. (Cory Frye, “Rebirth After Rajneeshpuram,” Corvallis Gazette Times, 07/08/2018.)

This word can also be a synonym for irregular or abnormal.