What do rappers mean when they say addlive?

Rappers often use the term "addlib" to refer to an ad-lib, which is a spontaneous, usually improvised remark or phrase that is added to a speech, performance, or piece of writing. In rap music, adlibs are often used to add emphasis or enhance the overall flow of the song. Rappers may adlib with sound effects, words, or phrases that may or may not be related to the lyrics of the song. These adlibs can be spoken, sung, or rapped, and they often serve to add energy to the performance and create a unique sound.