chrons
Chrons are the SI unit for level of being intoxitaced by THC (delta-9-tetrahydrocannabinol) where 50 chrons leads to passing into an unconscious or incohearent state, and 100 chrons leading to death. 100 chrons being roughly the equivalent of a quarter pound of marijuana consumed in 2 hours by one person.
stonner:
   Yo Nick, whats gonna be the SI units for 'being stonned'? I'm going to lable the highness graph "something vs. time" and put it on the side of Asteroth**.
hippy: 
   ... (pause in deep contemplation)... Chrons
stonner:
   Yeah, like spelled "C-H" or with a "K"
hippy:
   well, definitely "C-H" 'cuz its like 'chronic'.

**Asteroth: a massive bubbling gravity /waterfall bong (massive)