From Longman Dictionary of Contemporary Englishdishonourable dischargedisˌhonourable ˈdischarge British English, dishonorable discharge American English noun [countable, uncountable] PMAan order to someone to leave the army, navy etc, because they have behaved in a morally unacceptable way
Examples from the Corpus
dishonourable discharge• The outcome - a court-martial and a dishonourable discharge. 