From enterprise level software consultants all the way down to your helpdesk, us technical people love using the word "robust." It's been ingrained into the minds of IT folks as a buzz word to razzle dazzle decision makers.
I guarantee you that a damn good few technical experts don't know the definition.
The next time you hear someone say "robust" or "scalable" or "ubiquitous" or "paradigm" or even "legacy" I dare you to ask them for a definition. Sharpen your BS detector and have fun with it.