Chocoblocked
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.