Delaware County when it was simply called the "suburbs", where there were trees, back yards, clean streets, and nobody opened fire plugs on hot days since there were some real swimming pools there. Darby-Colwyn and Chester were the exceptions, and were the original Delco. Pre-Delco is a term usually used by older persons who lived in W or SW Philly and remember when those suburbs was where "the rich folks" lived, or folks moved to once they became successful or got a better job, and then they got all hoity-toity, snobby and lost all sense of street-smarts.
Movin out to Pre-Delco Upper Darby, Ridley, or Yeadon used to be the American Dream and were real nice places till folks stopped sweepin off their front stoop, cuttin their grass, and takin their trash cans in, so it's been downhill ever since.
by BustedUpGrunt February 10, 2022
Get the Pre-Delcomug. 
by John handpick November 1, 2018
Get the Pre-Beatmug. When you ask for something from someone and they ask your parent/guardian if its ok and they say no.
You: Hey Tony can u get me a soda?
Tony: (to your mom) hey can they get a soda.
Mom: not right now.
You: (to tony) wtf, why did you ask, you could of just got me one and she wouldnt notice!? Dumbass pre-snitch bitch.
Tony: (to your mom) hey can they get a soda.
Mom: not right now.
You: (to tony) wtf, why did you ask, you could of just got me one and she wouldnt notice!? Dumbass pre-snitch bitch.
by Inkoooooo29 August 20, 2017
Get the Pre-snitchmug. What's worser? A pre-course is no real course in a meal buffet, it's tantamount to Prince William's marriage to Kate Middleton.
You don't get the main course and the dessert and the hors devours because you did a pre-course, and by now she's devoured other men's' dicks and balls at Disney.
by Nelly's On Fire October 4, 2020
Get the Pre-coursemug. A collector that orders things in advance to ensure they are one of the first to recieve to add to their collection
by InitialDYee March 5, 2024
Get the Pre-hoardermug. by Amatory December 29, 2016
Get the Pre-Taintmug.