JBD, or journaling block device, is a generic block device journaling layer in the Linux kernel written by Stephen Tweedie from Red Hat. What is JBD ? There may be more than one meaning of JBD , so check it out all meanings of JBD one by one. In addition, Catapult Two's jet blast deflector (JBD) has been moved so that it will no longer foul the landing area while raised for launch, eliminating time wasted. Looking for the definition of JBD? Find out what is the full meaning of JBD on Abbreviations. Short for Jonas Brothers Disorder.