from http://www.jewish-languages.org/jewish-english.html

Many [Orthodox Jewish] community members talk about "Yeshivish," as we can see in the title of a popular book (Weiser 1995) and in this song by the Orthodox band Journeys:

    In the hallowed halls of yeshivos ('Yeshivas') far and wide,
    Our young men have discovered a new way to verbalize.
    With Yiddish, English, Hebrew – it's a mixture of all three,
    And a dash of Aramaic – a linguistic potpourri!
    That's called: yeshivishe reyd ('Yeshiva speech'), yeshivishe shprax ('Yeshiva language'):
    Take ('really'), epis ('something'), grade ('in reality'), a gevaldike zax ('remarkable thing').
    It's called: yeshivishe reyd, yeshivishe shprax:
    It's the tawk of the town, mamish ('really') tog un naxt ('day and night').