so bad, stupid, etc. it isn't true

so (something) it isn't true

Someone or something has so much of a particular characteristic or quality that it is hard to believe. Don't believe a word he says; that politician is so corrupt it isn't true!
See also: true

so ˌbad, ˌstupid, etc. it isn’t ˈtrue

(informal) used to emphasize that somebody/something is very bad, stupid, etc: His brother is so lazy it isn’t true!
See also: true