diddums!
exclamation UK humorous uk/ˈdɪd.əmz/ us/ˈdɪd.əmz/
（用于表示对行事孩子气的人不感到同情）
something you say to show that you feel no sympathy for someone who is behaving like a child
He called you a bad name, did he? Ah, diddums! 他骂了你，是不是？哎哟，真可笑！