Coolidge-level training

An extreme or "advanced" degree of "Silent Cal" tutoring in the art of keepin' yer trap shut and/or using as few words as possible to get your point across. 'Nuff said.

I am so glad that international phoning-rates have been drastically reduced over the past decades... if you were still charged several dollars per word, you'd practically need Coolidge-level training to be able to afford one of those beastly calls!