The phrase "le sigh" was often followed with a "le purr" in the series.
Many little blogging junkies have taken this saying and put it to their own usage to describe the feeling of dejection, apathy, dreaminess, etc. Sadly, most do not know the origin of the phrase. Even so, it is still a quite useful and popular term.
Apathetic Blogger: "Le sigh, I am so bored."
Dreamy Blogger: "Le sigh, So-and-So is so sweet."
"It seems that I am all alone in this post-apocalyptic world....le sigh...."