“Go Yewts” to someone in Cougar gear, that is just the Yewt trying to be friendly and strike up a conversation, but in an awkward way. I think most of the time the Yewt is well meaning, but has seen bad examples of how to behave. Now if the Yewt flips you off, swears at you, or rambles about “magic underwear,” that Yewt is definitely hostile and should be approached with caution.