From The Collaborative International Dictionary of English v.0.48 :
Seven-up \Sev"en-up`\, n. The game of cards called also all fours, and old sledge. [U. S.] [1913 Webster]From WordNet (r) 3.0 (2006) :
seven-up n 1: a form of all fours in which a total of seven points is game [syn: seven-up, old sledge]