blue streak

agile brisk hot nimble quick rapid swift

accelerated active dashing electric flashing fleet fleeting flying hurried racing ready snap split-second winged

PDQ breakneck double-time expeditious expeditive hairtrigger hasty hypersonic in a jiffy in nothing flat lickety split like a bat out of hell like all get out like crazy like mad on the double posthaste presto pronto screamin' snappy speedball supersonic velocious

clumsy slow

dull

plodding tardy unhurried