I know that most of the time I have to spell out what I mean in front of listening ears. Sometimes though I have to abreviate stuff so that it's just initials.
I know that at work we have nick names for the big bosses that are also not names of other staff names so that we can talk about them and not get into trouble.
In the 80's series Auf Wiedersehen Pet, whenever they used to talk about the German lads they used to say "Eric said" and then talk about them so that they would not get found out.