Baka
Note: This is actually how baka got its meaning.
Kagome was one day bored in school. She was flipping pages when she had noticed something interesting. When she got back to the feudal era she had to tell some one. She spotted Inuyasha first. "Hey Inuyasha!"
"What is it Kagome?"
"I want to tell you something!"
"Well can't it wait for later I was planning to take a nap right now."
"Take a nap later and listen to me!"
"No!"
"But…"
"NO!"
"Oh Inuyasha your so frustrating." He continued to walk away. "Inuyasha…SIT BOY!" Inuyasha went head first into the ground. "Now if you don't want me to do that again you listen, aw right?"
"Ya ya whatever."
"Guess what I learned in school today."
"What?"
"The word baka."
"Idiot, you know baka means moron."
"Well I found out how it got its name."
"How."
"Well ba means horse and ka means deer. There is a legend that a foolish king from the ancient Chinese Qin dynasty saw a deer and yelled out ba instead of ka. And then they gave him the nickname baka.
"… Well he really is a hoursedeer."