Beer head is a term used to describe the FOAM that forms on top of a beer when it is poured. It is made up of tiny bubbles of carbon dioxide and is usually creamy in color. The crossword solution for Beer Head is FOAM, which is an acronym for 'Froth On A Mixture'. This term is used to describe the FOAM that forms on top of a beer when it is poured. The FOAM is made up of tiny bubbles of carbon dioxide and is usually creamy in color.