A twenty year old that still wants to be a teen.
I just turned twentyteen!
The second decade of the new Millennium.
When we had the 80's and the 90's, they were easy decades to reference. This new decade is a little harder. So, being the teen years, it's the twentyteens.
1) One year older than nineteen.
2) Kiran, when she couldn't bear the thought of losing her "teenager" status.
Kiran is twentyteen years old.
someone who is either 20 or in their early twenties but might as well be considered a teenager due to their immaturity and/or lack of life skills/experiences.
Heather: Joe asked me out!
Michelle: that guy from best buy? how old is he?
Heather: 20...only 7 yrs younger..
Michelle: eww he is twentyteen! you might as well add a teen to that age he is so young..unless he is sexy dont bother!