up to eleven in Spanish — Translation

extremo

(idiomatic, informal, chiefly, humorous) Up to or beyond the maximum possible threshold; to an extremely high or strong degree. [from 1984]

máximo

(idiomatic, informal, chiefly, humorous) Up to or beyond the maximum possible threshold; to an extremely high or strong degree. [from 1984]

llevar al extremo

verb

(transitive, slang) To increase (something) to an extremely high or strong degree; to make (something) go over the top.