double-quick
at speed
fast
zippy
quick as a flash
at a rate of knots
before you can say knife
quickly
before you can say Jack Robinson
superquick
hot
velocious
at full tilt
briskly
apace
superspeedy
nineteen to the dozen
lightning fast
swift
blazingly
like the wind
lightningly
feverishly
with a quickness
before one knows where one is
speedingly
lickety
volley
quick
at the double
speedy
prestissimo
crash
in no time
full pelt
mile a minute
like winkin
pacey
exponentially
furiously
quick-handed
full tilt
like a rat up a drainpipe
high-tempo
good lick
like shit through a goose
like winking
rapidly
fall over one's feet
lickety-split