flagitious (adj.) Look up flagitious at Dictionary.com
"shamefully wicked, criminal," late 14c., from Old French flagicieux or directly from Latin flagitiosus "shameful, disgraceful, infamous," from flagitium "shameful act, passionate deed, disgraceful thing," related to flagrum "a whip, scourge, lash," flagitare "to demand importunately," from PIE root *bhlag- "to strike." Related: Flagitiously; flagitiousness.