lickety-split

adverb Informal.

1. at great speed; rapidly: to travel lickety-split.

adverb

1. US and Canadian informal very quickly; speedily

adj.1852, American English (earlier lickety-cut, lickety-click, and simply licketie, 1817), from lick (n.1) in dialectal sense “very fast sprint in a race” (1809) on the notion of a “lick” as a fast thing (cf. blink).