Latin Phrases Everyone Should Know

Carpe Diem: Seize the day (probably written on a white board in a classroom somewhere)

Caveat Emptor: Let the buyer beware (on legal stuff)

Cogito, Ergo Sum: I think, therefore I am (something profound to impress your friends)

In Absentia: While absent (also on legal stuff e.g., trial in absentia)

In Flagrante Delicto (my favorite): In flaming offence or in the act of a crime (as said in Clue)

Ipso Facto: By that very fact (used in philosophy, law, and science)

Mea Culpa: By my fault (as said in V for Vendetta)

Persona Non Grata: An unwelcome person (diplomatic term)

Prima Facie: On first view (another legal term)

Post Mortem: After death (as said on detective shows)

Pro Bono: Done without charge

Quid Pro Quo: Something for something, this for that (as said in Silence of the Lambs)

Tempus Fugit: Time flies (song by Miles Davis)

Terra Incognita: Unknown land

Vox Populi: Voice of the people (as said in V for Vendetta)