What are birds?

"What are birds?" was a running goof from Season 7 where the party repeatedly attempted to decipher what exactly Jett Razor meant when he described "shagging birds" and "fine birds". This was a play on Jett Razor's cockney accent, as "bird" is a British slang term for a woman in a romantic/sexual context. It was eventually jotted down in the quest log to be explored further, but never came to a conclusion. So, did Jett Razor fuck literal, feathered birds? I wouldn't put it past Mike Bachmann. The world may never know.