Top Definition
1. The "third best" RR at the New York MTA (there are only three). A very poorly run organization constantly beset with daily problems that makes millions of people late.

2. A corrupt organization that lies about how well it is doing.
1. The f!$%@'in LIRR was an hour late today - for the fourth time this week.

2. The "On Time Performance" was 96% this month....
by Any L.I. comuter June 17, 2007
1 more definition
short for Long Island Rail Road

The commuter rail of Long Island. It is larger in number of track miles, trains, stations, employees, and revenue than any other commuter rail in the nation.
Long Island Rail Road, going your way.
by Rushmore June 13, 2004

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