The waiter's indifferent attitude made the customers very unhappy.
Tips
memory
Literally 'attend to or not attend to' - the person can't be bothered to decide whether to pay attention to you. The ABCB pattern (爱X不X) signals indifference.
usage
Often used with 的 as a modifier: 爱理不理的态度 (indifferent attitude). Describes someone's dismissive behavior toward others.
