keep up on (verb) know: understand information
Sinonime: PDQ,
accelerated,
active,
agile, blue streak, breakneck,
brisk, chop-chop, dashing, double-time,
electric,
expeditious, expeditive, flashing,
fleet,
fleeting, flying, hairtrigger,
hasty,
hot,
hurried, hypersonic, in a jiffy, in nothing flat, lickety split, like a bat out of hell, like all get out, like crazy, like mad,
nimble, on the double, posthaste, presto, pronto,
quick, racing,
rapid,
ready, screamin',
snap*, snappy, speedball, supersonic, swift, velocious,
wingedAntonime: plodding, slow,
tardy, unhurried