park the car in Harvard Yard
Definition from Wiktionary, the free dictionary
- (idiomatic) A sentence used to illustrate that the Boston accent is non-rhotic; typically pronounced "pahk the cah in Hahvad Yahd".
- 1998, Walt Wolfram, Natalie Schilling-Estes, American English: Dialects and Variation 
- ... for “Park the car in Harvard Yard.” Interestingly, one of the most stereotypically r—less ... pahk the cah 'park the car' as you shape your answer.
- 2000, Allan A. Metcalf, How We Talk: American Regional English Today 
- The "New England broad a" Park the car in Harvard Yard. That saying is a well-known test for New England pronunciation. If you say "Pahk the car in Hahvahd Yahd," ...
- 2003, Kim Grant, Boston: With Cape Cod & New England Getaways. 
- The Boston dialect is famous for broad-vowel English; Pahk the cah in Hahvahd Yahd (translation: Park the car in Harvard Yard) is the common illustration of the peculiar 'r.'
- 1998, Walt Wolfram, Natalie Schilling-Estes, American English: Dialects and Variation