Generic syrup more frequently used on pancakes waffles. Syrups, by the way, are traditionally boiled-down fruit juices which, when enough water is removed, are viscous and self-sweetened. Modern syrups are highly sweetened juice concentrates. Blueberries are blue or blackish and derive from a shrub. Blueberry syrup is uncommon in mixed drinks, but is found in the BLUEBERRY RUM FIZZ.