From Longman Dictionary of Contemporary Englishincorrigiblein‧cor‧ri‧gi‧ble /ɪnˈkɒrədʒəbəl $ -ˈkɔː-/ adjective BAD PERSONsomeone who is incorrigible is bad in a way that cannot be changed or improved – often used humorouslyan incorrigible liar/rogue etc Peter, you are an incorrigible flirt! —incorrigibly adverb
Examples from the Corpus
incorrigible• To the adults of the town, he was incorrigible.• Then she said I was incorrigible, and I said that was a compliment.• an incorrigible criminal• He has an incorrigible fondness for persons of low birth and spends most of the day with them.• He was an incorrigible liar too.• First, women were probably regarded as more hopelessly incorrigible, more totally irredeemable when fallen.• And even Cotton Fitzsimmons, an incorrigible optimist by nature, seemed to buy into that at least a little bit.an incorrigible liar/rogue etc• He was an incorrigible liar too.Origin incorrigible (1300-1400) Late Latin incorrigibilis, from Latin corrigere “to correct” 