小妹妹萌哒哒大哥哥帅帅的
[xiăo mèi mèi méng dā dā dà gē gē shuài shuài de]
Little sister is super cute and big brother is very handsome: A playful name emphasizing cuteness (associated with younger girls) and handsomeness (for the elder males). Implies endearment and admiration within a sibling-like relationship or fantasy.