cerebral constipation 

The act of completely forgetting the name of an actor, song, book, movie or name of anything that one is generally familiar with. The "on-the-tip-of-my-tongue" phenomenon. The 'mind-burp' is the moment of relief, the actual recall. i.e., "Aha! I got it! I remember!"

The movie buff had a bad case of "cerebral constipation" as he choked under pressure when the cute waitress asked him for the name of his favorite romantic comedy.

cerebral constipation by ZonaCat Hansen June 28, 2008