From Longman Dictionary of Contemporary Englishget behind phrasal verb1 NOT DO somethingif you get behind with a job, payments, rent etc, you do not do or pay as much of it as you should have by a particular time with I don’t want to get behind with my work. You can always catch up later if you get behind.2 get behind somebody informal to support someone The crowd really got behind them and cheered them on. → get→ See Verb table
