Green’s Dictionary of Slang

Pennsy n.

[abbr.]

1. the Pennsylvania rail route.

[US]Scranton Trib. (PA) 29 Oct. n.p.: [headline] Nothing to Indicate That the Road Will be Controlled by the Pennsey.
Times Dispatch Industrial Section (Richmond,VA) 27 Jan. 23/4: [headline] Forester for Pennsy. Railroad to Grow Its Own Trees for Cross-Ties.
[US]Day Book (Chicago) 7 Nov. 5/1: [headline] Triple Wreck on Pennsy [...] A triple collision on the Pittsburgh division of the Pennsylvania railroad.
[US]C. McKay Home to Harlem 148: Better here than the Pennsy pigpen.
[US]C.B. Davis Rebellion of Leo McGuire (1953) 163: We’re going into Chi on the Pennsy and in the diner I see a little bald man eye me.
[US]B. Appel Tough Guy [ebook] ‘The Hudson Dusters,’ Joey said, naming the gang below the Pennsy tracks.

2. Pennsylvania; also as adj.

[US]Eve. World (NY) 29 Nov. 1/1: [headline] Harvard Defeated. Pennsy Downs the Crimson Eleven.
[US]Arizona Republican (Phoenix, AZ) 26 June 1/6: Pennsey banquetted [...] A dinner was given in honor of the rowing crew of the University ot Pennsylvania.
[US]Day Book (Chicago) 22 June n.p.: [headline] Crack British Coach Bosses Pennsy Crew.
[US]Wash. Times (DC) 29 June 6/2: [headline] Pennsy Employees Agree on New Working Rules.
[US]B. Appel Brain Guy (1937) 21: Living in a small dinky Pennsy town like Easton.
[US]C. Rawson Headless Lady (1987) 35: We just got out of mine strike territory in Pennsy.
[US]Kerouac On the Road (The Orig. Scroll) (2007) 330: When we get to Pennsy we’ll start hearing that gone Eastern bop on the disc jockeys.