pahk

This should read 'park' as in 'Park your car'. It is a not too kindly knock by outsiders on how people native to the Boston, Massachusetts area pronounce words that include the letter 'r'. Interestingly enough, there are other words where the letter 'r' is added where it does not belong; words ending with the letter 'a'. See examples of both. This 'Boston area' speak has its roots in Great Britain where it is still used in certain parts of England and not necessarily just by the lower classes, but also the upper classes.

'Pahk yah cah in Hahvahd Yahd' should read 'Park your car in Harvard Yard'. This phrase is often given as an extreme example. Other examples of the missing 'r': the smoker; the drinker; that's pisser (vulgar slang) becomes the smokah; the drinkah; that's pissah. An example where the letter 'r' is added where it doesn't belong: The female name Linda becomes Linder.