really cool, but in a more subtle way. as opposed to extreme or awesome. one of the highest compliments you can give someone. being rad is like being cool without having to work for it. it's like a natural coolness.I love the wording "being cool without having to work for it". That defines so well many of the guys who are cool, but they really have to work for it. Then there are guys, who just are rad, cool without having to work for it.
I bet you native speakers might not find it hilarious, but it really made me smile. Written by +Henri Hämäläinen