Nick Jonas Is Clearly a Twentysomething

F---in’ kid.

Nick Jonas was obviously feeling a little show-off-y today, so the 20-year-old shared the buffstastic pic at right with the world.

’Cause, really...WTF not, right?

Well, to be somewhat fair to the ham guy, he did point out that he was just letting us know that you can be a diabetic and in terrific shape with a little healthy living, so y’ know, two points for promoting a proactive lifestyle.

And...uh...all the points that he wants for that pose.

Werk!

Photo: Instagram.com/nickjonas.