rapper

n. rap music artist, one who records or performs rap music; one who knocks or taps; doorknocker; one who talks or chats

Rapping is the rhythmic spoken delivery of rhymes and wordplay, one of the central elements of hip hop music and culture. Although the word rap has sometimes been claimed to be a backronym of the phrase "Rhythmic American Poetry", "Rhythm and Poetry", "Rhythmically Applied Poetry", or "Rhythmically Associated Poetry", use of the word to describe quick and slangy speech or repartee long predates the musical form.
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Noun
1. someone who performs rap music
(hypernym) singer, vocalist, vocalizer, vocaliser
2. a device (usually metal and ornamental) attached by a hinge to a door
(synonym) knocker, doorknocker
(hypernym) device
(part-holonym) front door, front entrance

n. rapper

adj. agile, nimble, brisk, alert, light heeled, light legged