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1. A play on the word 'overkill' with reference to just chillin'. 2. An overdose of chillin'
'What did you do last night?'

'Just watched an awesome movie, played on my XBox and hit the club scene with a couple of friends'

'Whoa dude...that's pure overchill!!'
by Siddarth Shetty January 12, 2010
16 3
Its when one is chilling too hard/drinking too much.
OVER CHILL, is when one is chilling too hard, as in drinking too much to the point where one is going to pass out/blackout/throw up.
by CARZdotCOM August 20, 2010
2 0
When you are so high that you forget to breath.
Brady smoked so much weed that he passed out from overchill.
by danky JJ August 14, 2010
8 7