A commonly used phrase to inform someone (usually a supervisor or someone in charge) that you have absolutely no idea what the answer to a particular question or problem is, but that you will do some digging immediately...
Captain Kirk: "ensign, do we have any data or record of a previous encounter on this enemy craft?"
Ensign: "... cross referencing all known databases now Captain!"
An exclamation to be blurted out when witnessing a fail, or while failing yourself.
Clarence, whilst out strolling, was fortunate enough to witness a drunken individual being ejected over the handlebars of a bicycle. "Hmm, muttered Clarence, that is most definitely an Oos Diggy Das"...