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1. pop a cork
to have a hard poop, and then as soon as that ones out you have diarrhea.
To pop a cork:

It felt like i was constipated at first, then i popped a cork and it was smooth sailing from then on.
2. pop a cork
To get angry beyond belief and tell someone off without any civility, restraint or courtesy.
Dude, did you just see that girl flip you off?

Yeah, and if she flips me off again, I am going to seriously pop a cork.
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