The Collaborative International Dictionary of English v.0.48:

Hotfoot \Hot"foot`\, adv.
   In haste; foothot. [Colloq.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

hotfoot
    adv 1: without delay; speedily; "sent ambassadors hotfoot to the
           Turks"- Francis Hackett; "drove hotfoot for Boston"
    n 1: a practical joke that involves inserting a match
         surreptitiously between the sole and upper of the victim's
         shoe and then lighting it
    v 1: move fast; "He rushed down the hall to receive his guests";
         "The cars raced down the street" [syn: rush, hotfoot,
         hasten, hie, speed, race, pelt along, rush
         along, cannonball along, bucket along, belt along,
         step on it] [ant: dawdle, linger]

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "hotfoot":
   amain, apace, at once, bound, by forced marches, canter, cursorily,
   expeditiously, feverishly, fox-trot, furiously, gallop, get,
   get cracking, git, hand over fist, hastily, helter-skelter,
   hightail, hop, hop along, hop to it, hump, hump it, hurriedly,
   hurry-scurry, immediately, in passing, instantly, leap, lope,
   make tracks, on the run, pell-mell, promptly, quickly, run,
   shag ass, shake it up, slapdash, snap to it, speedily, spring,
   sprint, step, step along, step lively, step on it, superficially,
   swiftly, tear ass, trip, trot, with a rush, with all haste,
   with dispatch, with haste