To Make Noise
To Be Boisterous, To Make A Fuss
intransitive verb, godan verb
The kanji is boisterous. The verb version is to make noise or to be boisterous. Basically, you're being boisterous when you make a lot of noise, so that's where it comes from.
You're always going to make noise and be boisterous when you eat something sour (さわ). Imagine stuffing lemon slices, sour candy, and umeboshi into your mouth. All at once. See how much noise you make? They're so sour, and they make you so boisterous.
騒ぐな！死にたいのか？死にたくなけりゃ黙ってろ。
Don’t make so much noise! Do you wanna be killed? If not, just shut up.