Ad-lib

Ad-lib（源自拉丁文 ad libitum，意為「隨意、即興」）指在主要人聲（Lead Vocal）之外錄製或現場演繹的即興感襯詞、感嘆詞、呼喊、短語或重音墊音。在現代嘻哈（尤其是 Trap 與 Drill）中，Ad-lib 不僅用來填補歌詞停頓間的留白、增強節奏動態與人聲層次，更常演變成饒舌歌手極具辨識度的個人招牌標籤（如 Travis Scott 的 "Straight up!" / "It's lit!"、Migos 的 "Skrrt!"、Pop Smoke 的 "Woo!" 等）。

Ad-lib (short for the Latin ad libitum, meaning "at one's pleasure") refers to improvised vocalizations, exclamations, ad-libbed phrases, or background vocal accents layered over or between lead vocal tracks in hip-hop. In contemporary rap music (particularly Trap and Drill), ad-libs serve not only to fill empty space, enhance rhythmic momentum, and add spatial texture to a track, but often become an artist's iconic sonic signature (e.g., Travis Scott's "Straight up!" / "It's lit!", Migos' "Skrrt!", or Pop Smoke's "Woo!").