fast_food=* describes type of fast-food service with tag amenity=fast_food. Can also be added to eg. amenity=fuel or shop=*, to show that takeaway food is available there.
Common values
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See also
cuisine=*- Describes the type of food served at a place.cafe=yes/no- Indicates whether a feature has a café.food=yes/no- Indicates whether a feature provides food.food:*=*- Describes if (and optionally how) a certain food type is available at an amenity or shop., eg.food:cake=yes/no/served/packaged/takeaway/fresh.drink:*=*- Describes if (and optionally how) a certain drink is available at an amenity or shop.diet:*=*- The prefix for several diet:* keys to describe dietary options. Should not itself be used as a key.takeaway=*- Whether the restaurant offers meals for pick-up that can be consumed elsewhere.delivery=*- Sets whether the restaurant or shop offers delivery service.drive_through=*- To indicate whether an amenity offers a drive-through service.drive_in=*- To indicate if an amenity (such as a cinema or restaurant) offers a drive-in service.