Urbnesia Share definition Flag When on Urbandictionary trying to search up a word, you get caught up reading the new words on the home page. Thus, forgetting what you really wanted to search. "Foo I'm hella suffering from that Urbnesia, what word did the nigga wanna search?" Urbnesia by SP-Tino February 16, 2009 0 0 Get merch Get the Urbnesia mug. Buy Now — $32.95 See more merch