Nalla veikin (The Nalla Virus)

When you start talking in a humorous, silly, nerdy, untruthful, sarcastic, high and low pitch, PG - 13 type of way.
= When you suddenly start talking like Nalli.

Person 1: "Wow, that guy is so funny, why cant i stop laughing? He is'nt even being that funny, I think he is being serious!
Person 2: "Oh yeah, he probably just has "Nalla veikin (The Nalla Virus)" !"