Certain Sooner is a term used to refer to the University of Oklahoma's sports teams. The term is derived from the school's nickname, the Sooners, which was given to them in the late 1800s when settlers raced to claim land in the Oklahoma Territory. The crossword solution for this term is 'Tulsan, ' which refers to someone or something from Tulsa, Oklahoma. Tulsa is the second largest city in Oklahoma and is located about an hour and a half away from the University of Oklahoma in Norman.