A Butters - You say a Butters when someone promises to do something, and

You say a Butters when someone promises to do something, and if they don't, you hit them like they owe you money.

I said Butters to him and now he owes me a punch.

She said Butters and then ran away like a coward.

He said Butters and I hit him so hard he went to the moon.