Khalas — Arabic for 'finished' or 'enough' — becomes xalas in UAE text messages, group chats, and social media because Gulf Arabic speakers rendering the 'kh' sound (خ) in English letters often choose 'x' as the closest visual equivalent. This substitution (also '7' for ح, '3' for ع) is a whole informal orthography called Arabizi. Xalas is done. The thing is over. Nothing more to say. Xalas.