凹凸凸的小奥特小奥特的凹凸凸
[āo tū tū de xiăo ào tè xiăo ào tè de āo tū tū]
It's a playful combination derived from Ultraman, which is a very famous Japanese hero series beloved by many kids. This name adds 'concave and convex', implying the hero's bumpy experience in life in a humorous style, and indicates the owner might have special sentiments or stories connected with Ultraman.