1. (adv.) In a bold, careless manner; at random.

2. (adv.) With a slap; all at once; slap.

3. (v. t.) To apply, or apply something to, in a hasty, careless, or rough manner; to roughcast; as, to slapdash mortar or paint on a wall, or to slapdash a wall.

a corps perdu accident-prone aimless airily amain any old way any which way anyhow apace at once breakneck bunglingly by forced marches careless carelessly casually clumsily cursorily cursory designless desperate desperately desultory devil-may-care disregardfully expeditious expeditiously festinate feverish feverishly flying forgetfully furious furiously hand over fist haphazard haphazardly happen what may harum-scarum hastily hasty head over heels headfirst headforemost headlong heedlessly heels over head helter-skelter hit and miss hit or miss hit-or-miss holus-bolus hotfoot hotheaded hotheadedly hurried hurriedly hurry-scurry immediate immediately impetuous impetuously in passing inattentively inconsiderately indiscriminate instant instantly irregular last-minute like crazy like mad mad madly messily messy offhand offhandedly on the run on the spot once over lightly overeager overeagerly overenthusiastic overenthusiastically overzealous overzealously passing pell-mell perfunctorily precipitant precipitantly precipitate precipitately precipitous precipitously promiscuous promiscuously prompt promptly quick quickly ramble-scramble reckless recklessly regardlessly slam-bang slap-bang sloppily sloppy slovenly snap speedily speedy spot superficial superficially swift swiftly tactlessly thoughtlessly unguardedly unheedfully unheedingly unmindfully unsolicitously unthinkingly unthorough untidy unvigilantly unwarily urgent wanton wantonly wild wildly with a rush with all haste with dispatch with haste