Chinchillin is a form of extreme chillin. Usually performed after a lame ass day of school and/or work. Alcohol, weed, ecstasy or cocaine must be used before attempting to chinchill.
That nigga Johnny B and I were chinchillin last night with some bitches.
Chinchillin Is a word to express that if you've grown up worrying about money as you didn't have much, and you've been hardworking and saved they money for the right reasons and don't have anything to worry about because you now can throw money at things and have no worries about it, that's Chinchillin. Also, in relation it is a metaphor from the luxurious and expensive coat made of chinchillas which keep you warm if you're too cold from chillin too much.
Hey... look Deej is Chinchillin today, but I'm broke as a joke soo I can't , I can only chill.