What is Rillin'?
1.
A combination of relaxing and chillin'. A cooler, newer and fresher version of the word chilaxin'. Commonly used when a person is even too lazy to say chilliaxin', showing an ultimate state of coolness and relaxation. The most extreme version of relaxation.
Alan: Hey man! Sup?
Sean: Ah y'know, just rillin'.
Alan: Dude... Respect.
See 
2.
Better than chillin'
Man 1: Ayyyy sup bro?
Man 2: Ayy dude nothin' much jus rillin' with my broski's.
See 
Random Words:
1. 
cop cock,police penis, aka dick
Dialogue
Person#1 Yo I got drunk at this party, and stumbled into a cop
Person#2 Did you touch his ni.. 
1. 
Commonly used by uneducated French Canadians meaning to say man made lake.  Also known as a lake made by humans...stipid Frenchy.
You e.. 
1. 
Used to say it's time to drink.
"Hey, it's already quarter after beer, let's party!!"
See beer, time, thirty,..