Chillen with the billen means your chilling at home watching YouTube or drawing, in other words your doing absolutely nothing. If your talking to a friend about it means your just doing the same as normal. Another way to say it, is chillen with THE billen.
Friend #1: What’s upman?
Friend #2: Not much, just chillen with my billen.
To hang hard, preferably with several to many bros, engaging in activities such as beer pong, delving into the seminal works of David Hume, drum circles, rap battles, disk golf, and imbibing ganja through various techniques, only to name a few.
-Hey baby, you wanna smoke L's in the jacuzzi with the girlies and I?
-Sorry gurrl, but chu know I'm chillen' hardbody with my doggTron 2nite!