Blanket

Blanket is a large piece of thick mass of woolen or other material which is either used as a spread on bed or for covering for warming up the body. Any similar piece used differently is also called a blanket, such as a piece in offset printing, or any thick layer covering something such as blanket of snow. Blanket ban is total ban.

People born on the wrong side of the blanket are those who are born of parents not lawfully married. Usage of this phrase has now become out of fashion.