Noun: a person's nickname.
Somewhere between seventeen and twenty I predominantly stopped referring to the males I met by their true names. Instead I elaborated on some rather obvious aspect regarding their character, mannerism, nationality or look; voila a nickname was born. It just seemed easier when explaining a story to use a detail orientated adjective as an alternative instead of repeatedly clarifying who so and so was. This became a regular thing amongst my friends and I and to this day is still used on the daily.
Foot fetish (aka FF)
I like your speedo
The youth **used numerous times**
Youngin' **used numerous times**
Coincidentally just last night, during a conversation between my best friend and someone, I was referred to as 'Tinder girl'. I always hoped that when I discovered a nickname used in place of my name it would be much more exciting...