post-haste
quicker than scat
whip and spur
rushingly
in quick sticks
superspeedy
with a quickness
hurryingly
scurrying
splitting
hurrying
on the jump
toot suite
superquick
quick as a flash
like a scalded cat
like a raped ape
like a scalded dog
streak
bundle
leg it
spur
amain
vamoose
in a jiffy
in haste
good lick
like a rat up a drainpipe
whurry
zippy
besharp
fall over one's feet
briskly
fast-flying
flying
blazingly
lightning fast
spin
lightningly
hare
rush
at full tilt
mile a minute
apace
rushedly
in no time
full pelt
prestissimo
like winkin
speedfully
shift
fastish
ultrarapid
fast
post
hying
in a hurry
get a move on
hurriedly
precipitated
forthright
raking
hot
fly
hie
velocious
tear along
wallop
in short order
velocitous
pacey
belive
rapidly
hand over hand
reak
get a wiggle on
blazing
faster than Minute Rice
fast-moving
blistering
go great guns
get a wriggle on
before you can say Jack Robinson
volley
furiously
before you can say knife
exponentially
speed
rake
like the wind
haul ass
tantivy
nippy
dash
speedful
sprint