A 4chan meme started in 2006 of the Dragonball Z character ‘Cell’ in blackface shouting “I’M A’ FIRIN’ MAH LAZER!!” sometimes interpreted as “SHOOP DA WHOOP” or “I’M A’ CHARGIN’ MAH LAZER”, typically ending with the firing of said lazer, usually from the mouth. Though the origin is disputed, Encyclopedia Dramatica claims it to be a Flash animation called “Syntax Error #2” on /b/.
Want more sounds like this one? Do a quick search!