>>2954911Those three words refer to very distinct states of masculine phenotipes and or social standings and even though they often have some degree of overlap they can be identified as separate phenomena.
Cu.ck is synonymous with doormat, someone who lets others walk all over him and deprives himself of well being for the pleasure of others to a ridiculous degree. The most extreme case is that of someone who lets other men fuck his wife/gf in front of him.
Nu-male is someone who is beta but has some degree of success. Is a functional manchild to some degree.
Soy boy is a person whose body has been modified greatly by the action of estrogenic compounds to the point it barely shows any masculine characteristics. Such a person looks and behaves effeminate to a point it can be cringe inducing.