“What is a cuck?”
Well, it has a couple of meanings, but in general it refers to a weak, ineffectual man. Here’s one definition I found from an online dictionary:
“a weak or servile man (often used as a contemptuous term for a man with moderate or progressive political views).:
But the term cuck is actually derived from the older term ‘cuckold’, which means:
‘a man whose wife is unfaithful”.
So, without any means of knowing if Jill Biden is unfaithful, we’re going with the first one?