/wun"up"meuhn ship'/ , n.
the art or practice of achieving, demonstrating, or assuming superiority in one's rivalry with a friend or opponent by obtaining privilege, status, status symbols, etc.: the one-upmanship of getting into the president's car pool.
Also, one-upsmanship /wun"ups"meuhn ship'/ . Also called upmanship, upsmanship .
[ 1950-55; ONE UP + -MANSHIP ]