What is "loop the loop"

vb. To perform any of several aerobatic manoeuvres in which the aircraft flies around a vertical circle

Loop the Loop was an early looping steel roller coaster which operated at Olentangy Park in Columbus, Ohio during the first decade of the 1900s. It was one of the first looping roller coasters to operate in North America, and it was designed and built by noted inventor Lina Beecher.

Loop the Loop was a dual-tracked steel roller coaster which operated on Coney Island, New York from 1901 to 1910. The coaster was one of the first looping roller coasters in North America.

Loop the Loop (also known by some sources as the Flip Flap Railway) was a dual-tracked steel roller coaster which operated on Young's Million Dollar Pier in Atlantic City, New Jersey from 1901 until 1912. Loop the Loop was one of the earliest looping roller coasters in the United States.