SLAPS

A blow, especially one given with the open hand, or with something broad and flat.

The sound of such a blow.

Makeup; cosmetics.

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."

A two-player reaction game in which opponents slap each other's hands.