Fling off Definition 1 of 3Pro Tip 1/3Quick Action Emphasizes a swift and sometimes careless movement. In a rush, she flung off her shoes. Pro Tip 2/3Heat Relief Often used when someone discards clothes due to high temperatures. Sweating profusely, he flung off his jacket. Pro Tip 3/3Casual Tone This phrase has a casual, informal connotation and shouldn't be used in formal writing. At the beach, they flung off their sandals.