Soy Boi

A very skinny effeminate man. The type of guy who would be a bottom even if he were straight.

Usually a unconfident and insecure person with a lack of game so they end up using their social skills in a self centered and manipulative to try to get with women,
a soy boi is the kind of person to completely change there moral standards and personality to appeal to someone they find sexually attractive and because these people lack game they go out of there way to do things that appear morally good but aren't because they always have an ulterior motive to there actions which is usually for a women's attention.
a soy boi is someone who will snoop to any level in hopes of receiving sexual intercourse which usually doesn't play out in there favor.

An effeminate male who’s feelings get hurt far to often, usually resulting in some kinda of pitiful retort or changing of the subject.

a cross between a "simp" and a "nice guy". Rare in real life, but abundant on the internet. Usually claim to be politically correct, eco friendly and so on but only because it makes others perceive them in some type of way. a Soy Boy tends to base his values and morals off of what the majority opinion is to avoid backlash and appear to be a "nice guy". the ways in which soy boys are simps is that their morals and values are changed to appeal to the opposite gender. the special thing about soy boys is that most of them are not self aware in what they're doing and genuinley and don't see how they're manipulating people's perception of them.

Lacking any masculine features and probably has a mom hair cut.

A submissive cuck

Soy boy is a pejorative term sometimes used in online communities to describe men lacking masculine characteristics. The term bears many similarities and has been compared to the slang terms cuck (derived from cuckold), nu-male and low-T ("low testosterone") – terms sometimes used as an insult for "male femininity" by online communities.

The term is based on the presence of the phytoestrogen isoflavone in soybeans, which has led some to claim that soy products feminize men who consume them, although there is no correlation between consumption of soy phytoestrogens and testosterone or estrogen levels or sperm quality.

The term is often used as an epithet by "internet trolls". It is often targeted at perceived social justice warriors, vegans, liberals, and similar groups. The term has also been used in online debates about the fashion appeal of cargo shorts.