Nagareculpist
A Nagareculpist is a person who won’t take blame for anything. They’ll say you did it, they did it, or the whole world did it. They’re like a kid who spilled juice and blamed the juice.
You did it. I didn’t. I was just there. And I was very innocent.
I didn’t forget your homework. The homework forgot me. And it was a very lazy homework.
I didn’t cheat. I just got lucky. And the teacher was blind.