Historically the term “cuckold” was general parlance for any man whose wife cheated on him. It carries with it an implicit notion of humiliation, because he’s been deceived by his wife who has been having sex with other men without his knowledge (much less his permission.) The term infers that a woman, and her sexual availability, are the property of her husband. Hence, the term “cheating” as a synonym for infidelity — the notion that some thing of value has been unfairly taken.
These notions make little sense in today’s world, where women as well as mean are seen as having sexual agency, but the term does persist.
The term “cuckold” is generally used a bit differently in the lifestyle, specificity in the context of “hotwifing”. For several years I played now and then with a couple who operated a “hotwife” website. I got to know a fair amount about that segment of the lifestyle community playing with them and other hotwife couples. My interactions with these couples were nothing more or less than the MFM interactions often described on this board. Within the hotwife community there is a specific subset called “cuckold”, characterized by the husband/BF being degraded and humiliated verbally and sometimes physically (having to tend to the refreshment needs of the wife and the other man, or orally clean up their juices) by the wife and or other man, who is often referred to as a “bull”. I’m disinterested In either of those roles, but for those men who are into it the humiliation is highly gratifying.
So, NerdsAreFun, you may choose in the context of communicating within the lifestyle community to refer to any man who in a three-way permits another man to have sex with his wife as a cuckold, but you will risk others seeing you as lacking broad knowledge of the lifestyle.