I have three coworkers within earshot, who over the last couple years have each developed their own phrase they mutter. It really seems subconscious at this point. I have a guy that sighs, "Mercy" ever-y-time he sits back down from walking around the office, an "Ooo--kkk" guy, and a "Hmmm" guy. They do this multiple times a day and I don't think they know it anymore. Any similar experiences?