A person who undertakes busking
. See that node for more details.
The origin of this word comes from Medieval England, where travelling performers wore a certain kind of boot, made out of buck skin. This kind of boot was good for long overland journeys by foot.
They were called "buckskinners" for this reason, and the name was evenually shortened to "Buskers."
Incidentally, "buskar" means "stop" in Sanskrit.