Dr Beferooz taught computer science. He walked into compiler design class one day, and said that we were going to discuss loophole optimization.* He pronounced it as peephole (\ˈpēp-ˌhōl\ ), but the next time he pronounced it as peefole (\ˈpē-fōl\ ).
Thereafter Dr Beferooz alternated the pronunciation of peephole and peefole. He either didn’t know how to pronounce peephole, or he was playing with our minds.
From his normal use of English, I am fairly sure that he was playing with our minds.
* For the sake of this story, knowledge of compiler design is not necessary.