Urbnesia 

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

urbanesia 

inability to remember a word previously published on urban dictionary

Mick, I can't remember the word/definition I submitted to UD. WTF was it? Urbanesia is so frustrating.

urbanesia by BrookeNM July 13, 2011