barn ‧ storm /ˈbɑːnstɔːm $ ˈbɑːrnstɔːrm/ BrE AmE verb [intransitive]
[ Date: 1800-1900 ; Origin: barn + storm 'to attack' ; from the performance of traveling actors in barns ]
American English to travel from place to place making short stops to give political speeches, theatre performances, or aircraft flying shows
—barnstormer noun [countable]