MeanOF

flat-out

- adverb (adv)

Meaning: at top speed

Synonyms: all-out all the way at a good clip for all one’s worth full blast head over heels in full gallop lickety-split the whole nine yards to the max unrestrainedly wide open without reservation

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.