busk
verb [intransitive]to perform music in a public place and ask for money from people passing by 街头卖艺 
Word Originmid 17th cent.: from obsolete French busquer ‘seek’, from Italian buscare or Spanish buscar, of Germanic origin. Originally in nautical use in the sense ‘cruise about, tack’, the term later meant ‘go about selling things’, hence ‘go about performing’ (mid 19th cent.).