From Longman Dictionary of Contemporary Englishget off the trackget off the trackspokenCHANGE FROM ONE THING TO ANOTHER to begin to deal with a new subject rather than the main one which was being discussed Don’t get off the track, we’re looking at this year’s figures not last year’s. → track
Examples from the Corpus
get off the track• I almost wet in my pants before I got off the track to relieve myself.• After debating, I decided that I should not get off the track. 