chillaxin is a portmanteau of chillin’ and relaxin’, refers to an extreme state of contentedness.

chillaxin是chillin’（平静）和relaxin’（放松）两个词的合成形式，指一种极度满足的状态。

when we say that you are chillaxin, we mean that you are releasing yourself from inhibition, worry, tension, etc. to kick back, take it easy.

当我们说你在chillaxin（悠然自乐）时，就是说你在让自己远离一切桎梏、担忧和压力，彻底放松以使自己恢复活力，然后轻松面对一切。

for example:

this weekend i took it real easy and was just chillaxin' from friday night to sunday night.

这个周末我觉得很自在，从周五晚上到周日晚上都自己悠然自乐。