Western Pennsylvania/Pittsburg slang tends to hurts my ears:
Yinz
Jagoff
My dad’s father was from that area, and he had the Yinz pretty bad. Another thing I’ve noticed from Pittsburg lingo is “Couple-two-three.” As in, “I saw a couple-two-three guys out ice fishin.” My boss is a Western PA guy and he says it all the time. Also, names of stores etc. get a possessive “s.” Like, “I went to NAPA’s to get a wheel bearing” or “Are yinzez going to Sheetz’s? Get me some beers.”
Another curiosity of local language I’ve noticed in some of the more remote places: how road names are conveyed. It’s not Thunder Lake Road, it’s THE Thunder Lake Road. It’s not Wilson Rd, but THE Wilson Road.