Common in Cook County, IL (aka Chicagoland), it's when 2 cars, 1 behind the other, come to a full stop at a stop sign and then both proceed through the intersection together even though the law requires the 2nd car to stop again after the 1st car proceeds.
OFFICER: I'm ticketing you for going through the stop sign without stopping.
DRIVER: But I did stop!
OFFICER: No! A Cook County Stop doesn't count. You were supposed to stop again after moving up to the crosswalk
When your listening to a Hebrew school classmate read Hebrew from a book, which sounds like meaningless gibberish, for what seems like an eternity but only a minute or two has passed. May be used to describe any extremely boring classroom experience.
Hebrew School Minute may also apply to listening to an extremely boring lecturer.