Le Sigh
From Encyclopedia Dramatica
Le sigh is often used in shitty conversation to imply a sigh for whatever random reason. People generally use it because they assume it makes them look interesting or intelligent, when in all actuality it makes them look like a moron, as most things French tend to do.

This is an example of how "Le Sigh" is used in most conversations between peasants...
Not to be confused with: le sic.
Also used in the popular flash cartoon, The End of the World.