Definitions for "Bull Float"
A tool comprising a large, flat, rectangular piece of wood, aluminum, or magnesium usually 8 in. (20 cm) wide and 42 to 60 in. (100 to 150 cm) long, and a handle 4 to 16 ft. (1 to 5 m) in length used to smooth unformed surfaces of freshly placed concrete.
Flat, long handled device that is used to smooth wet concrete.
Like the wooden float and the darby, a bull float is a smooth platform with an attached handle that's used to finish and texture newly poured concrete. It tends to be larger than its cousins, however, and its long broomlike handle makes it better suited to reaching across larger expanses of concrete. Home Improvement Encyclopedia