Client: "My dog had surgery for bilateral ACLUs a couple of years ago."
Doctor Sarcastic: "Bilateral ACLUs?" (--> biting cheek, trying not to laugh in front of client)
Client: "Yeah. You know, where the ligaments get torn in the knee. Oh and one of the patellas was torn, too."
Doctor Sarcastic: "Oh my. Well I'm glad you had his ACLUs repaired because that's an awfully painful condition."