refers to a situation in which an undesirable candy bar in a vending machine is blocking access to the desirable candy barbehind it.
Dammit! I was jonesing for some peanut M&M's but I got choc-blocked by that Almond Joy bar that's been sitting in front of them for the past three weeks!
Essentially getting cock blocked from completing a level on Candy Crush Saga by the growing chocolate bar.
This is what happens to you when you are playing Candy Crush Saga, and the chocolate seems to intentionally grow in such a way that it prevents you from breaking it, or grows in the opposite direction of the only match close enough to break it.
Candies are laid out in this pattern: OOXO
Chocolate grows in the location of the "X"
"Dang it. I only had one Jelly to break and I just got choc blocked again! Screw you Candy Crush!"
When you're hanging out with a really health-conscious and/or skinny person and really want some chocolate yet choose not to eat it because you feel insecure about eating chocolate in front of the aforementioned health-conscious and/or skinny person.
I really wanted to buy some M&Ms from the vending machine, but I was chocoblocked by Ben, whose presence was a constant reminder that I should probably go on a diet.