lickety-split

Etymology
First attested during the 19th century, in the US, as a fanciful alteration of the noun “a very fast sprint”, and the verb. The forms and  are similarly attested.

Adverb

 * 1) Quickly; as fast as possible; in short order.
 * At the sound of the starting gun, they were off and running lickety-split.
 * I need tea right now, lickety-split.