Asked the classic question of what do you do for a living, and the reply being, “I’m a Project Manager, specialising in IT”.
End of conversation – people move on, or change the subject. Now it’s not like I said I’m a murderer, or a vivisectionist, or banker. But it’s true, it’s guaranteed to end the conversation; unless of course your standing in the middle of a bunch of IT people, in which case it could well end the conversation anyway.
Try it and see the reaction for yourself