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.
An expression used when one is rather miffed. See also rawr or wtf mate.
An exclamation of anger, usually used when swearing is not an option.
The man wisely stopped himself from swearing and replaced the profanity with "Gah!"
Another exclamation used to identify an object or event that seems to be ironic or contradictory.
"You're gay, you're mom."
"Gah gahs!
A good looking person. Who is often half scottish half indian, and doesn't have a weird accent.
Maan, look at that girl, she's so GAH!
Another, slightly more interesting way of saying "Ugh"
Mother: Time to wake up dear, its 1pm.
Son: Gah!