Omega is the last letter of the Greek alphabet. An omega male then is the "last" man. In essence, if you were to rank all the men in the world by their virtues¹ (bravery, intelligence, leadership, generosity², etc.), an omega male altogether would be the worst, hence "last," of all men.

Omega是希腊字母表中的最后一个字母。因此，omega male自然指的就是男人中排在“最后一名”的人。也就是说，如果要给全世界的男人按照勇敢、智力、领导能力、慷慨程度等优点排名的话，omega male肯定是排名最后的。因此，这里译作“绝世衰男”。

This often-unemployed, romantically challenged loser can show up as a perpetual adolescent, or a charmless misanthrope³, or a happy couch potato. He can be sweet, bitter, nostalgic, or cynical⁴, but he cannot figure out how to be a man.

这些衰男时常处于失业状态，感情发展也不顺利。他们有时像永远长不大的孩子，有时又是个惹人厌的愤世分子，有时又躺在沙发上盯着电视傻乐。他可以是甜蜜的、苦涩的、忧愁的，或者愤世的，但他似乎总是不知道该怎样做个真正的男人。