ass o'clock by LudwigVan on Oct 02, 2004 14:43:28 An unreasonably early hour. Example: I gotta get up at ass o'clock every day for the next month. I hate my job.
ass o'clock by the riverside on Nov 04, 2023 12:28:49 A time very late at night or very early in the morning when most people are or ought to be asleep. Example: My sleep schedule is ruined because my favorite YouTuber uploads at ass o'clock