From Longman Dictionary of Contemporary Englishrun off phrasal verb1LEAVE A PLACELEAVE A RELATIONSHIPto leave a place or person in a way that people disapprove ofAmy’s husband had run off and left her with two children to bring up.2run something ↔ offTC to quickly print several copies of somethingI’ll run off a few more copies before the meeting.3run somebody off something to force someone to leave a placeSomeone tried to run me off the road.Smith had run them off his property with a rifle.4run something ↔ offAWRITE to write a speech, poem, piece of music etc quickly and easilyHe could run off a five-page essay in an hour.5run off at the mouth American English informalTALK TO somebody to talk too much6run something ↔ offDLOTHIN PERSON to get rid of weight or energy by runningI’m trying to run off some of the calories in that chocolate cake! →run→ See Verb table
Examples from the Corpus
run off at the mouth• That never used to be a fault of his, running off at the mouth.• To what smug labors and running off at the mouth!• Boyd seems to enjoyrunning off at the mouth to the press.
run-off• a run-off election• Noir and Dubernard both won the second-round run-offs.• The Piedmontese plain is well watered by the run-off from the Alps.• Rivers have been polluted by chlorine, phenol and detergent, together with run-offs resulting from the over-application of pesticides on farmland.From Longman Business Dictionaryrun something → off phrasal verb [transitive]1to quickly print several copies of somethingCan you run off a couple of copies of this report?2be run off your feet to be very busyIt was just before Christmas and all the sales staff were run off their feet. →run→ See Verb table