Luftberry?? what is the meaning?

[Buckeye30]

In his book Rickenbacker says that when Lufbery was c/o of the 94th. he ordered his pilots to circle the field twice before landing to avoid the frequent near-misses and collisions; originally called the "Lufbery Show". Presumably where the "circle" comes from, and a post-WW1 term as Stig described ?
Nick