A crazy, and often, a certifiably insane female. Characteristics of a twatisaurus (Also known as a Twatisaurus Rex, or Twatisaur) include irritability, ignorance, lack of care for others, stupidity, and many other symptoms.

A twatisaurus resembles a very angry dinosaur on a rampage. See "PMS."

A portmanteau of carpe diem, a Latin phrase that means “Seize the Day!” and DM, which stands for Direct Messages. This word means seizing the day via DMs.

something a chick would call her best friend if she was being annoying or dumb.