Superlative form of "cool beans"
What's cooler than cool beans? ICE COLD beans! .... Well indeed, but what's cooler then ice cold beans? 0 degree Kelvin beans...or Kölvins... There just ain't no cooler.
"Zup son, did you bring them trees?"
"Duuude you don't even know! i've got some dank ass hashish"
"Kölvins!"