Beta
Beta male
Example
Simon's such a beta. Can you believe he cooks his wife dinner every night?
... yes, I can. This is why you don't have a GF, Chad

Related Slang
Alpha | Alpha male |
Sigma | Sigma male |
Omega | Omega male |
Incel | Involuntary celibate |
Rightist | A person with radical right-wing political views |
Soy boy | A male who lacks traditional masculine traits |
Chad | A physically fit, overly confident man |
A beta, or beta male, is a male who shows submissive, passive characteristics. Self-proclaimed alphas often use this term to describe males they consider weak and/or inferior.
For example, incels often describe "unmasculine" men (who show such "terrible" traits as kindness to others and deference to women) as betas. Many of these incels, who picture themselves as frustrated alphas-in-the-making, may even decry their own beta status.
Alt-right communities also use the term beta, to describe men they feel are too woke and anti-male in their beliefs. These "traditionalists" think progressive males are too deferential to others' feelings and opinions, and should instead assert their inherent right to dominance.