Someone who blames everything on something all the time.
"I blame Tom."
"Wow, you're such a blamer!"
A supporter of President Barrack Obama that defends him by saying President George Bush implemented policies and caused conditions that have ruined Obama's presidency and therefore President Obama cannot be held responsible for at election time or any time.
A Blamer on a social media site said: Frankly I'm more disillusioned with the President who CREATED the problems, than the one who inherited them. (Do a little research on Bush's unprecedented support of American oil company profiteering).