A few years ago my kung fu school developed a relationship with a local and well-regarded WTF Olympic Style Tae Kwon Do school and we initiated a technique-exchange of sorts. A technique we learned from them that got a lot of traction in our school is a short, quick roundhouse-style kick aimed near-exclusively at the midsection that you throw without the full rotation of the hips that accompanies a traditional roundhouse.
The name I learned for this kick was something like "Pe Chagi." The reason I say "something like" is because I am slightly hard of hearing and their instructor has a notable accent, so it's entirely possible that I was mishearing him. I can not find anything like this kick on any list of TKD kicks and my attempts to Google it by name have been entirely unsuccessful. It seems unlikely to me that this is something unique to this particular instructor as their school trains explicitly and successfully for international WTF competition. I'm hoping someone here can help me identify it and spell it correctly.