constantly grinding
To be working hard and thinking hard, constantly; thus being on one's grizzy

It refers to the lifestyle of the young, emerging worker in the knowledge economy. In addition, a satire on the corporate exploitation of talent in the knowledge production markets; similar in the way casual Fridays were spawned by tech workers in the early 90s.  

Worker 356: 
Yaaz B, Jane said she’s give you head if you come drinking with us tonight. 

Worker 244: 
Shut up fuck face! Can’t you see I’m working!? Constantly grinding, always thinking up new ideas and shit.
