“In computer programming, code smell is any symptom in the source code of a program that possibly indicates a deeper problem.” — Wikipedia

I found this piece of code this morning, I think it counts as something gone terribly, terribly wrong:

return displayItemDetails(this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode, 14059111);

(The code was in-line JavaScript, inserted into a onclick handler, generated in PHP)