Slap
noun
A blow, especially one given with the open hand, or with something broad and flat.
The sound of such a blow.
Makeup; cosmetics.
verb
To give a slap to.
“She slapped him in response to the insult.”
To cause something to strike soundly.
“He slapped the reins against the horse's back.”
To strike soundly against something.
“The rain slapped against the window-panes.”
adverb
Exactly, precisely
“He tossed the file down slap in the middle of the table.”