The act of scrambling onto UrbanDictionary.com to quickly find out the definition of a word, usually when used over texts or IM. Used to cover up the fact that you did not know the meaning of the word prior to its use.\n\nCommonly abbreviated to UDCU.\n> Person A: "yo dude, that jam was live last night."\n> Person B: *quickly does an urban dictionary cover-up*\n> "yeah, that was a pretty cool party."\n