Chris from Harrisonburg, Virginia, grew up in Pittsburgh saying jaggin around or jagging around for goofing off, teasing, or playing tricks. This classic Pittsburghese term is tied to the old verb jag, “to prick, stab, or jab,” so the teasing sense...
The Dictionary of American Regional English traces you-uns, a plural form of you, to the Midlands and the Ohio River Valley. But the expression goes back a while. Even Chaucer used something similar. Compare you’uns, yinz, and other plural second...

