Stupidity

The quality of being stupid or unintelligent. Behavior that shows a lack of good sense or judgment. In other words something that is not believe and the thing the person that lied about.

Random karen: The sky is falling! What are u you doing?! Run!
Jack: Now that's just stupidity.

Baka

Baka is word that is idiot if you translate it with japanese. It's basic and it's almost everywhere in every manga/anime you watch.

Alexa: Haha I win!

Jack: Aww dang, your a baka!
Alexa: WT-

Senpai

Senpai is a anime/manga word that actually means senior in japanese.

In other words: The only time you can call someone senpai is your japanese teacher if you are in japan.

Never call your friend senpai they will probably get a M-16 on you.

Japanese teacher: 先輩について学びます (We are going to learn about senpai's.)

Renlu: 先輩はどういう意味ですか？(What does senpai mean?)

Japanese teacher: 上級 (Senior.)