And yet, teenagers are speaking here : I've just stumbled upon this BBC video featuring pupils from a Londonderry College. Listen to Northern Irish pupils talking about the slang they're familiar with : click on the map...
Map from the U.S. Central Intelligence Agency (Public Domain)
Coping with both slang and Northern Irish accent... not easy, eh ? ;o)
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(to) stumble upon = to discover something by chance, or to meet someone by chance
(to) cope with = to deal successfully with a difficult situation