What mean Bazinga?

"Bazinga" is a nonsense word that Sheldon uses to indicate that he has just successfully pulled a prank on someone. It's kind of his way of saying "Gotcha" (I fooled you).

Bazinga means: "Ha!"

I think that Bazinga is a word that is used when somebody plays a short prank on somebody else. Therefore, Sheldon hardly ever plays tricks. And when he does, he always says Bazinga!

I don't what what that means

Its a combination of 3 elements, they are in the periodic 表, テーブル they are: BARIUM (BA) ZUUNIUM (Z) LODINE (I) NITROGEN (N) AND GALLIUM (GA)
I really dont know wath happen if あなた put together this elements but i hope something fun...... dont あなた think? :D