Found it in my Japanese-language Arabic learning book. I know the Arabis is Jaamuusun (Jawaamiisu) which means "buffalo". Also, the Kanji are 水 (water) and 牛 (cow). However, I don't know how to read 水牛. Is it "mizuushi", "mizugyuu", "suiushi", or "suigyuu"? A water cow means a buffalo still makes sense, though, I and my brother made a joke about it.
Me: "I read in my Japanese-language Arabic learning book that "jaamus" which means "buffalo", in Japanese has the Kanji of "water" and "cow". I don't know how to read it, though. Is it "mizuushi", "mizugyuu", "suiushi", or "suigyuu"?"
My brother: "It seems that it is "suigyuu"."
Me: "Buffalo being called as water cow still makes sense, though."
My brother: "Hmmm... Right..."
Me: "I remember when watching a TV series, the comis relief summoned a water buffalo, then what cames down was a hippo."
My brother: "What?"
Me: "Yeah, and hippos aren't even buffaloes! They are horses (the Indonesian word for "hippo" is "kuda nil", which literally means "Nile horse")! Emmm... Actually, they are pigs..."