MCing/Rapping

Rapping (also known as emceeing, Mcing or spitting bars)
refers to spoken rhyming lyrics with a strong rhythmic
accompaniment. It can be broken down into different
components like content, flow (rhythm and rhyme) and
delivery. Rapping is different to spoken word poetry
because it is performed in time to the beat of the music.

DJing/Scratching

Scratching is a DJ technique used to produce distinctive sounds
by moving a vinyl record back and forth on a turntable while optionally manipulating the crossfader on a DJ mixer. While scratching is most commonly associated with hip hop music it
has been used in some styles of pop and nu metal. Within hip
hop culture, scratching is one of the measures of a DJ's skills.

Beatboxing

Beatboxing is a form of vocal percussion primarily
involving the art of producing drum beats, rhythm, and musical sounds using one's mouth, lips, tongue, and voice. It may also involve singing, vocal imitation of turntablism, and the
simulation of horns, strings, and other musical instruments.