Used commonly by MMORPG players to convey that they are unimpressed or annoyed to the point that they actually type it out.
Usually the player is trying to show that they clearly know more about a video game and are mocking other peoples knowledge of said game.

Unfortunately it's just a fucking game and knowing more about interactive fiction than having social/survival skills classifies the player as a total douchebag and most likely to be the first to die when presented with a life or death situation.
noob player: "So how do I kill stuff?"

douchebag player: "*sigh* Stop playing the game, your stupid question annoys me."

noob player: "what a douche"

Real World Scenerio

Frantic Person running by: "Oh my god! Some guy has snapped and is on a killing spree! Get the fuck out of here!"

douchebag player, thinking to him/herself: "*sigh*, if only I could use invisibility, just like in my favorite game, I could....Ahhh!"

The douchebag player has been killed by the rampaging psychopath.
by Societyisfucked April 06, 2009
Get the *sigh* neck gaiter and mug.
*sigh* is That one expression you get when someone is annoying or something is annoying or someone is boring or something is boring
Robuxian: "want free robux? this tip will help you!"
Guy: *sigh*
by JamezWebResearch August 30, 2017
Get a *sigh* mug for your barber Julia.
See ugh

A noise that emits sadness or frustration
Bitch teacher: You have an F, see me after class
You: *sigh*
by sigh_ugh414 April 28, 2015
Get a sigh mug for your coworker Yasemin.
Loud sigh (release of air) to get other people to notice you are depressed, tired, bored or over worked.
Gee that's the 300th time today Martin has done the sigh.. poor bloke
by archie85 June 30, 2013
Get the sigh neck gaiter and mug.
A Silent Scream from deep within.
Feeling at wits end, she let out a sigh.
by cindi g. August 26, 2007
Get a sigh mug for your grandma Larisa.
intentional, vocal sighing done by one coworker passing another coworker's desk. Used to initiate a tedious conversation about themselves.
Geraldine is coming down the hall for another Sigh By.
by SCNYC January 13, 2011
Get a Sigh By mug for your brother Bob.