>>broken+Cg2
It's when you change upvotes and downvotes so that the ration stays similar, but now you can't consistently find if your downvoting bot had any effect.
>>icebra+0f
I found some obscure music video that had like ~200 likes with no downvotes but it didn't lasted long... not idea if it's bots that downvote stuff or just weird people (hate the word "haters" but that's what I mean)