The phrase ‘Et tu’ is a Latin expression that translates to ‘And you’ in English. It is famously known from William Shakespeare’s play Julius Caesar, where the character Julius Caesar says ‘Et tu, Brute?’ (‘And you, Brutus?’) upon seeing his friend Brutus among his assassins.
This phrase is often used to express betrayal, particularly by someone who was considered a close friend or ally. The historical context of the phrase adds a layer of dramatic irony and emotional depth, making it a powerful expression of shock and disbelief.