It's fun to mispronounce words or use malaprops around a certain type of person - you know, the type who are easily irritated by other people's mistakes. My favourite phrase for this purpose is "I beg my pardon" because you can easily argue aggressively that it's the proper expression if anyone tries to correct you ("Why would YOU need to be pardoned for something I did? That doesn't make any sense."). I've been saying it for so long now that it comes naturally to me and I have to remind myself that I'm being deliberately stupid.