Internet God.

Generally an insult to those who think they rule the internet.
IG Herki wrote the rules of the interwebz!!111
by Addmanz February 3, 2009
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It stands for inter-gender sleepover. It is a sleepover with both guys and girls, usually consisting of 2 guys and their girlfriends. It is usually one of the best events with the opposite gender in the world of people age 15-18, and almost always leads to sex, or at least other intimate contact.
My friend told me about an IGS he once had, and it sounds amazing. If I ever make the insane decision of possibly ever getting a girlfriend at some point in the next 2 years, I am gonna call a friend and his gf to come over and have it.
by M@77 J@M35 April 2, 2012
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"Refill the ice tray when it's empty, don't be fucking ig."
by Chode Licker March 25, 2008
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Ig, Almighty vulture God with fuzzy beek and cushy feeps.
Great Ig cares for all who would care for his birdies. Those who love birds - apart from the Kentucky Fried Chicken variety - and would nurture them, have a sure home and refuge in his flint-like heartbone.

'Great Ig, have mercy on us that show mercy to your birdies, and care not that they occasionally poop on our hats.

Amen'
by Keeper of the Ig June 18, 2006
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Ig is the great Vulture with cushy feet who watches over us all and protects us in his mighty wings.
There is but One Ig, his mighty beek smites those who would blaspheme. His Beady Eyes, can give a pericing look that will turn even the stong to mere wimpering blobs of misery. Ig is the holder and caretaker of the EYE of Ig, a stone of great power worn about his neck. See also Church of Ig
Oh Mighty Ig forgive us our missteps and hold us in your mighty wings. AMEN
by Father L. Church of Ig June 9, 2006
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Immature Gym Syndrome.

When someone claims they know how to body build, when it is clear they do not.

When said person posts comments on social networking sites about anything to do with their training.
When someone makes baseless, uneducated comments on the effectiveness of a supplement or training method.
Guy 1: "Yea, just eat whatever you want and drink a protein shake and you'll get big."
Guy 2: "You don't need to plan your meals, as long as you use supplements."
Guy 3: "Typical case of IGS."

On Facebook- usually a small guy: "Just had the best gym session."
Everyone else: "IGS"
by IGS Stan February 20, 2012
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