verb (used without object) 1.Chiefly British. to entertain by dancing, singing, or reciting on the street or in a public place.
2.Canadian. to make a showy or noisy appeal.
Origin:
1850–55; perhaps, if earlier sense was “to make a living by entertaining,” < Polari < Italian buscare to procure, get, gain < Spanish buscar to look for, seek (of disputed orig.)
Related forms busk·er, noun