up to eleven /ˌʌp tə ɪˈlɛvən/prepositional phrase 1verb 1forms 3 prepositional phrase1 •(informal, humorous) Up to or beyond the maximum possible threshold; to an extremely high or strong degree.She and River looked at me hard; but I lowered my eyes and leaned forward, with the nonchalance turned up to eleven, extinguished my cigarette, made eye-contact and nodded curtly. — 1997 verb1 •(slang) To increase (something) to an extremely high or strong degree; to make (something) go over the top. formsupped to eleven · upping to eleven · ups to eleven