To panhandle is to beg for money outside, on a public street. Someone who needs money to buy a bus ticket home might panhandle.
When people panhandle, they ask passers-by for cash. A man who's lost his job might panhandle so he can get something to eat. and a college student might panhandle on a busy street for money to buy a ticket to a concert. Panhandle is also a noun meaning a long, thin geographical area that's shaped like the handle of a frying pan. Both meanings date from the mid-19th century.