喪男
also: もお · もだん
Meanings
1
unpopular man; man who isn't well-liked by women
Internet slang, often used self-deprecatingly or humorously. Contrasts with 喪女 (もじょ), the female counterpart.
See also: 喪女 (もじょ)
He calls himself an unpopular guy and has given up on romance.
Online, there are sometimes threads where unpopular men console each other.