When you are singing, humming, mouthing, or whistling a notoriously famous song, and some guy, be it a friend or someone you don't know at all, starts singing the words to the famous song with you timidly and awkwardly, making you stop singing immediately. Typically the theory of "
pulling a Jimmy" can be tested by walking towards the person in question, and singing "
we are the champions." If the person joins you a couple words in, he is deemed to be
pulling a Jimmy. **Warning** avoid singing around these people once you have caught on to them! Or better yet.... try and see how many times in a row you can get the fool to join you in singing gayly and then tell all of your friends!
Dude, I went
downstairs and started singing "Doe, a deer, a female deer," and this guy named Jimmy started singing with me and I stopped
immediately because it was
extremely gay. He seriously pulled a Jimmy there.