china hole
The feeling of upset stomach, gas, diarrhea and general gastrointestinal malcontent.  China hole is usually caused by eating fast food or other questionable food products.
1)  Oh my God, Britney!  That Nacho Cheese Chalupa from Taco Bell has given me serious china hole!  Hurry...Pull the car over at that 7-eleven so I can hell my pants!

2)  The sushi here always gives me china hole!