1
general::
Swiftly, intensely and energetically, as in The storm moved in fast and furious, or The sale was going fast and furious, attracting large crowds. This phrase is Also often applied to intense gaiety, as when it was first recorded in Robert Burns's poem "Tam o' Shanter" (1793): "The mirth and fun grew fast and furious."
American Heritage Idioms
2
general::
Phrase(s): fast and furious
Cliché very rapidly and with unrestrained energy. • Her work in the kitchen was fast and furious, and it looked lovely when she finished. • Everything was going so fast and furious at the store during the Christmas rush that we never had time to eat lunch.
McGrawhill's American Idioms And Phrasal Verbs