Useful expression to prevent hot-headedness or anxiety. Often used alone, as in "Chillax!", to express dissatisfaction with another's mood.
Linguistic combination of "chill" and "relax", both common one-word comments directed at peers who suffer from seemingly unnecessary stress.
Try it, it's kind of fun to use!
This write-up inspired by my girlfriend's cousin, who used this word all the time with her cousins and siblings over a weeklong vacation