look up any word, like donkey punch:
 
2.
Become less tense or anxious.
"Just chill, man. It isn't that hard. Just vote for Shelly!"
by Nick A.B.C Robinson September 14, 2008
 
1.
relax you taking it to hard
Just chill my nig
by aka lil momma & c-lo October 27, 2003
 
3.
A condescending term used by idiots who don't realise how serious the situation actually is.
Normal guy; You fucking wrecked my car and now I am going to lose my job!
Hippie; Just Chill dude.
by Bobsyeruncle May 18, 2013