Top definition
Defining or explaining the meaning / origin of a topic, only to shortly find out that you are completely incorrect and had no idea what you were talking about.
He explained to us the historical origin of charity signs around the park, only to find out with a quick search that he had pulled a Jimmy Fund and was completely wrong and failed in every way.
by bigjackass March 15, 2010
Get the mug
Get a Jimmy Fund mug for your barber Vivek.