凹凸曼狠爱狠爱小怪兽小怪兽狠爱狠爱凹凸曼

This appears to play on a Chinese cartoon character 'Aotuoman' loving monsters very much and vice versa - it suggests a mutual adoration in the world of children's cartoons, expressing unconditional love or deep affinity for someone or something in a cute and somewhat whimsical manner. Specifically, the names mean that each party really 'intensely loves' the other in this fictional relationship, probably inspired by kid's media.