A really small jockstrap used in hockey. There's usually a guy on the team named Aiden who's tiny, so because they are small, the term Aiden Jockstrap is used to identify small things.
This eggplant from the supermarket is Aiden Jockstrap size.
The type of loser that seems exciting at first, but bland once you get to know him. Receding hairline and small dick. Usually a redhead, maybe has a Scottish family history, which makes them especially bad. Related to the gay small dick Jakob.