gray matter
Example:
1)I'm gonna splatter your gray matter on the wall with my sawed-off shotgun.
2)The hitman redecorated the room with gray matter.
3)You idiot! Why don't you use that gray matter in your head to think once in a while?
1)I'm gonna splatter your gray matter on the wall with my sawed-off shotgun.
2)The hitman redecorated the room with gray matter.
3)You idiot! Why don't you use that gray matter in your head to think once in a while?