The Dialect of Boston
Meaning:Stupid person. The phrase has spread westa Wihsta but its definitely of local origins. Casserine Toussaint reports It comes from back when people would make a massive bucket of chowder and lay a clean rope in it so that when they put it into the unheated back room it would freeze solid and could be hung up. Theyd slide off the bucket by putting a hot towel on it and voila! Anyone wanting a bowl of chowder went in and chipped off a piece to be warmed up on the stove. After a while the frozen block of chowder took on a round shape like a head.