The opener on The Slaugher Tape, the project that introduced 21 Savage to the rap world, takes its title from what's become arguably the most popular ad-lib of 2016. The sound is said to mimic either a car burning rubber as it proceeds upon a sudden getaway or a fork scraping the sides of a dope-coated pot. It's latter in 21 Savage's case -- an especially rusty fork chipping away at the charred remnants of crack cocaine.
Listening to him repeat ad-libs or certain words like "dip" or "drip" with his broken high-pitched rasp is strange and rather humorous -- until he stops smiling and starts snapping. When the raps begin on "Skrtt Skrtt," his voice still has a slight shakiness, but that doesn't detract from how vivid the lyrics are, especially when they rhyme so neatly. The intensity isn't in his loudness but in the boldness of every word. "Auntie hit the dope, she said it make her fucking jaw lock / Stray bullets hitting kids while they playing hopscotch." Lines like that are so ruthless that he needs to let them simmer with at least 30 seconds of "skrtt skrtt" action.