Someone who is aware of something terrible going on politically, but they stand down because they feel they don't have the power or manpower to do anything. This phrase comes from the book Animal Farm. This phrase isn't an insult but simply a way to describe.
Barry: "Did you hear about the US gov arresting people for what they claim is anti-tech extremism when they just want privacy which is a human right? What can we even do? No one wants to stand with me!"
Terry: "Yeah... me and most people are just a Donkey"
When you are trying to make fun of someone for being bad at something instead of saying, " you suck" you can instead say," Boi you donkeycheeks!" Therefore implying you are so ass at something you are ass compared to an actual ass's ass.
Boi you are donkey cheeks at touch football you couldn't catch the ball if it were the size of a watermelon.
That which allows a Democrat to do, say, or behave in ways that would have a Republican's house burned down, his land salted, and his family sold into slavery.
Remember when Hillary called young black dudes "Super-predators" and people voted for her anyway? That donkeyprivilege is kicking in big time.