chillen chill
The most extreme chill factor of chilling. Not only are you chillen, but you are being chill while chillen. Mostly used by stoners and any other chill-type people.
"What's up, man?" "Not much, dude. Chillen chill." "Oh for sure. That's chill."
Chill Chillen
The most extreme chill factor of being chill. Not to be confused with chillen chill, which is completely opposite. When chill chillen, you are chillaxed, and chillen while being chill.
Yo, dude, are you bored?" "No man, I'm chill chillen." "Chhiillll.