What for; What are you doing that for? Also; What is that for?
When people have no idea of something and stand there looking cross-eyed, while asking you stupid questions about your sport or job.
See also Wuffo (skydiving)
Your having a conversation about jumping off a bridge, skydiving or anything really... and the person who your speaking to has glazed over eyes and keeps asking you, What do you do THAT for? They are a Wutfo!...