The term 'THROW, AS A COIN' can be summarized as the action of tossing a coin. This is a common activity that has been around for centuries and is used to make decisions or settle disputes. It is often used in games of chance, such as flipping a coin to decide who goes first. It is also used in gambling, such as betting on the outcome of a coin TOSS. The four-letter solution to this crossword is 'TOSS'.