1.) A male or female that is unworthy of being called by the name their mother gave them at birth.
2.) A male or a female who is legally married and doesn't have the courage to say they want to throw in the towel and get a divorce, but wants to have a relationship with another person..i.e wants to have their cake and eat it too.
A word that is often used merely as a general insult, with no actual meaning. Many people find this to be a safer alternative to the porch monkey. (Always keep in mind, just because you may be "taking a word/phrase back," does NOT mean that everyone else thinks the same. This is especially true with racial slurs.)