·adv With a slap; all at once; slap.
II. Slapdash ·adv In a bold, careless manner; at random.
III. Slapdash ·vt 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.