http://mailchimp.com/about/style-guide/#voice-and-tone
Includes the passage:
“EEP EEP!
If you’re at all familiar with MailChimp, you’ve heard someone say “eep eep!” as an expression of delight or solidarity. “Eep eep” isn’t chimp talk, and it isn’t Freddie’s voice. It’s our rally cry. We say it when we’re speaking to customers, and we encourage our customers to say it when they’re talking about MailChimp.”
I managed only a low groan followed by the merry tinkling of keys on a forehead.
D
