What is the X in X-mas?
Latin, literally "let the buyer beware;" see caveat and second element of exempt (adj.).
Latin for “Let the buyer beware.” It means that a customer should be cautious and alert to the possibility of being cheated: “Caveat emptor is the first rule of buying a used car.”
(Latin: "let the buyer beware"), in the law of commercial transactions, principle that the buyer purchases at his own risk in the absence of an express warranty in the contract