Vision's Daily Log

Day 15

Sometimes I feel as if I am too logical.
Wanda informed me that I just have to 'chillax.'
I tried to tell her that such a word is not in the dictionary, therefore it cannot be performed.
But she proceeded to tell me that I was adorable and began to kiss me.
I would've protested and asked more questions about 'chillaxing' but I couldn't, as I was otherwise occupied.

So I pose this question to those who are not my fiancée. What exactly is 'chillaxing?' And why should it be performed?
I assume it is derived from the word, 'chill.' But I have no experience in that either.