Well, in UK (British) English a "toyboy" or "toy boy" means the same as that US "boy toy" phrase, although I see that "toyboy" is used over there. I think, however that the male adult toy thing is actually called "toys for boys" like so:
when a man says you are his "trophy" wife, it means you are the whole package. You got the looks, the sex appeal, the goods, etc., (money is the icing on top!)
however, some men have different definitions for it.