Terrible, very bad.

(video games) The option to play again through a previously completed game, carrying over characters, attributes, or equipment from the previous play session.

(Singapore, colloquial) absolutely, definitely, guaranteed

Alternative spelling of double-plus-ungood

Alternative spelling of double-plus-good

Alternative spelling of double-plus-good

Alternative spelling of double-plus-ungood

(literally) The more it changes, the more it's the same thing (sometimes loosely translated as the more things change, the more they stay the same).

The highest, ultimate point of achievement which can be reached; perfection. / The perfect or most extreme example of its kind; the ultimate.

(Britain) An examination, now mostly phased out, taken at age 11, to select the type of secondary education – either a grammar school or a secondary modern school.