Slap"dash` (?), adv. [Slap + dash.]
1.
In a bold, careless manner; at random.
[Colloq.]
2.
With a slap; all at once; slap.
[Colloq.]
Prior.
© Webster 1913.
Slap"dash`, 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.
[Colloq.]
Halliwell.
© Webster 1913.