凹凸曼没有蛋蛋
[āo tū màn méi yŏu dàn dàn]
“凹凸曼” is a character from an animated series; adding “没有蛋蛋 (doesn’t have eggs)” might imply it doesn’t matter if something looks tough on the outside, but in reality it’s nothing special. This phrase may carry some teasing or humorous tone. Also note that this sentence includes a vulgar term '蛋蛋'.