"~~ 旦_(･o･;)" is an emoticon commonly used in Japanese messaging to express anxiety, nervousness, or a sense of impending doom. It features a person kneeling with their head bowed and hands clasped together in front of them, with a sweat drop on their forehead. The emoticon can be translated as "This Could Drop In Any Moment" and is often used in situations where someone is waiting for bad news or anticipating something negative to happen.