The "Gaucho Slap" is commonly performed when a man and a woman are engaged in normal sex using a condom. Normal intercourse is the name of the game till the male ejaculates, at which point he removes the condom and whirls it around his head gaining centripetal acceleration (like a gaucho) once at maximum velocity he releases the condom, sending it flying into the face of said woman causing a "slap" noise along with an explosion of semen and other bodily fluids that will be sure to enrage any lover.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.