The correct answer would be "The King of Fart".
In English, "放屁大王" can be translated as "The King of Fart". This phrase refers to someone who is known for farting frequently or loudly. It is a humorous way to describe someone with a particular talent or habit. In English, we often use the phrase "The King of" or "The Queen of" to describe someone who is the best or most skilled in a particular area. So, "The King of Fart" would be the perfect translation for "放屁大王". This phrase is often used in a playful and joking manner, and it can bring laughter and lightheartedness to any conversation or situation.