Raise Your Hand If You Think “Yeah” Is Still Unprofessional

Boss, reading through company e-mails: Can I talk to you about this e-mail you sent to a client?
Employee: Sure.
Boss: In this e-mail you started out with the word “yay”; when I read this it struck me as very unprofessional. You shouldn't use the word “yay” when speaking with our clients.
Employee: That doesn't say “yay, it says “yeah”. It's a response to a question the client had.
Boss: Y-e-a-h is “yay.” Let's not use it in e-mails in the future, okay?
Employee: Okay (then under breath as he walks away) Fucking moron!

Salt Lake City, Utah