Slap \Slap\, n. [OE. slappe; akin to LG. slappe, G. schlappe; probably of imitative origin.]

A blow, esp. one given with the open hand, or with something broad.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slap \Slap\, v. t. [imp. & p. p. Slapped; p. pr. & vb. n. Slapping.]

To strike with the open hand, or with something broad.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slap \Slap\, adv. [Cf. LG. slap, G. schlapp. See Slap, n.]

With a sudden and violent blow; hence, quickly; instantly; directly. [Colloq.]

``The railroad cars drive slap into the city.'' --Thackeray.

Source: Webster's Revised Unabridged Dictionary (1913)