Anteia emailed us about sayings that her guild has -- when guildies enter guild chat, apparently they say "Parn," for no other reason than at one point someone said "Hola" while their Draenei filter was on, and it came out as "parn." Thanks to a guild typo, they also use "exacrit" in place of "exactly" (as something that crits logic), and running away in cheetah form is referred to as "hauling cat out of there." That's a good one, actually.
My guild has a few sayings (most of which have already sneaked into Guildwatch), though my personal favorite is simply yelling "Shaman Power!" when a Shaman in guild gets a nice drop or does something spectacular. Not nearly as catchy as Anteia's examples, though.
Has your guild built up your own jargon or sayings? When a group of people are placed in situations like this, it's almost unavoidable that they'd build up their own meanings and words among each other. What are some good sayings and phrases that your guild uses ingame?