學業時間的延長、工作的壓力、生活方式的改變，使得越來越多的年輕人延后了談婚論嫁的年齡。但姑娘們在找男友的時候也要擦亮眼睛，謹防“有毒單身漢”。

Toxic bachelor is an unmarried man who is selfish, insensitive, and afraid of commitment.
“有毒單身漢”指的是自私、感覺遲鈍、懼怕承諾的未婚男性。

They also refer to men who remain single past 40. 40 is a race-dependent number. Asians can be considered toxic bachelors if they remain single past 31.
超過40歲的單身男士也被稱為有毒單身漢。40歲是一個與種族相關的年齡界限。亞洲人超過31歲還沒結婚就會被認為是有毒單身漢。

They can be grouped in following two broad categories:
“有毒單身漢”常可分為以下兩大類。

1) Those who are always looking for the next best thing, due to some underlying issue that prevents them from forming a long term relationship.
1) 由于一些潛在的問題使他們總不能形成長期的戀愛關系，他們總在尋找下一位交往對象。

2) The ones who have a Peter Pan complex and just never want to grow up.
2 有彼得潘情結，永遠不想長大。

Most of these toxic bachelors seriously consider settling down once they have a mid-life crisis and see the writing on the wall. Then they try to get married in a hurry to have kids, and to ensure their own immortality through their offspring.
大多數有毒單身漢在遇到中年危機或者迫在眉睫的麻煩之后會認真考慮安定下來。之后他們急于結婚生子，以確保有后代來延續。

（中國日報網英語點津 yaning）