Словарь синонимов английского языка - post-haste

(adv) quickly, at once, without delay, immediately, directly, straightaway, right away, promptly, speedily, swiftly, instantly, before one can say 'Jack Robinson', before you can say 'knife', rapidly, at full tilt, in a wink, in a trice, in the twinkling of an eye, Colloq pronto, chop-chop, (p) d.q. (= 'pretty damned quick'), US and Canadian lickety-split, like greased lightning: He got me the report post-haste.