Baloobius
From Muppet Wiki
Boober examines Wembley's baloobius.
The baloobius is a part of Fraggle anatomy, the proper term for the fringe on the end of a Fraggle's tail. The baloobius tends to flare out when a Fraggle is scared.
In the Fraggle Rock episode "Scared Silly," Boober decides to test the baloobius of his fellow Fraggles, primarily Wembley.
