I learned this today. My friends told me about it. I assume they made it up. Its just a nice, discrete way of talking about porn. We had a conversation about Limewire and porno right in front of a teacher and she was oblivious. "Porno" has a way of attracting attention, but a nice soft "err" avoids that unwanted attention.
"To err is human, but to forgive, well thats right on!" Bad guy in Starksy and Hutch
eric: *glances at jaquann* "err...."
your interviewer asks: "You Have Read The Job Description And A Summary Of The Job Role So What Areas Of This Job Appeal To You The Least?"
Err can be used for pretty much everything, however it is mostly used when someone proves they are particularly knowledgeable about a topic, as a general insult or when someone is being a bit of an all-round twat.
Response:"Err George Michael"