out of surprise, amusement, amazement, “you wont believe this” type attitude, etc
"Oh my gah, you're not going to believe what happened to me in Vegas this weekend..."
by Blair Oh Baby June 27, 2007
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To refer to as a friend; same as "buddy" Listen to Wu tang's first cd, enter the 36s chambers for examples.
"What up, gah?"
"They got twos for fives down the way, gah"
by Bruce Griffin January 18, 2008
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A random word to keep a conversation continuously flowing or a word in place of God.
ex. 1. z1:How are you? z2:GAH!

ex. 2. Oh my GAH!
by Kc March 08, 2005
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Another meaning, derived from The Simpsons, for What? or Come again? Or a surprise
Person A: I passed math!
Person B: Gah?
by kidgorgeous21 May 15, 2003
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The perfect expression word for all purposes, created by Cassie. Can be used to express surprise, anger, confusion, laughter, sadness, happieness, sarcasm, boredness, and many more moods. The best word ever created. Caution: GAH IS ADDICTING! Catch the GAH disease today!
omGAh! Gah is so hardcore addicting, gahaha!
by Cassie April 10, 2005
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a random word 2 replace another word. or an expersion.

also can be used as gah happened meaning a cotastrofy just occured
I AM GAH!
today i was walking and gah happined
by captain sarag January 19, 2004
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to express a feeling of disapointment or annoyance. Only the the coolest people use this word.
GAH Derrick get out from under your desk.
GAH how did he kill me i usally pwn that noob.
by BoratBoratBorat December 21, 2006
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