You could try singing...................

When trying to express oneself, it's frankly quite absurd,
To leaf through lengthy lexicons to find the perfect word.
A little spontaniaty keeps conversation keen,
You need to find a way to say, precisely what you mean...

Supercalifragilisticexpialidocious!
Even though the sound of it is something quite atrosicous!
If you say it loud enough, you'll always sound precocious.

And if that fails try the driving off a bridge method??