Hey, I saw this was from a couple of weeks ago, but in case you're still wondering, I think I can help. Not sure if this is the proper spelling (PA Dutch being more spoken then written), but here it is, spelled phonetically:
Kannsht du mekka fanga? (Can you catch a fly?)
Ja, vann Sie hukkah bleivve. (Yeah, when they stay sitting!)
For those out of the loop, it's an old Pennsylvania Dutch in-joke/shibboleth to see if someone is from the community.