Meaning of “弱男”
“弱男” is an abstraction for JakushaDansei(弱者男性).
This is an internet slang, these days, I often see this word, but, unfortunately, I don’t know how to pronounce this.
Some people say “JakuDan” because this is an abstraction for JakushaDansei. On the other hand, some people say this is “YowaOtoko”.
Example Conversation on internet
A: I envy guys who are popular with women.
B: Year, ultimately, “弱男” like us are just eliminated and it’s our fate.