burn off
phr. v.. B1 Intermediate Oxford
phr. v.. to use up energy or fat by doing physical activity.
phr. v.. to expend energy, calories, or fat through metabolic processes or physical exertion.
I need to burn off that big lunch.
Running for thirty minutes is a great way to burn off extra calories from the weekend.
Athletes often consume high-carbohydrate meals before a race, knowing they will burn off the energy during the intense physical competition.
Usage
usually takes 'calories', 'fat', or 'energy' as a direct object.
Teaching tip
contrast with 'burn down' (destroy by fire) or 'burn out' (stop working); 'burn off' implies a process of elimination through use.
Pitfall
I burned off it at the gym.I burned it off at the gym.when using a pronoun like 'it', it must go between the verb and the particle.