look up any word, like fleek:
 
1.
A God among men.
Wow, I feel like a Kayin right now.
by Personman889 December 06, 2010
 
2.
a dumb Jamaican boy who sniff ass
the jamaican over dere is such a kayin
by mjdaking August 08, 2011
 
3.
To lay in bed not being able to sleep.
I was kayin last night, and it was drivin me crazy i just couldn't sleep.
by Waita August 13, 2006