Superman Jap Slap is when you perform the martial arts move of the “Superman Punch” but instead of punching, you slap your opponent with an open palm moving in a downward diagonal motion right-to-left (for right handers).
An open handed slap to the face. Reasons: stupidity, retribution or to rebuke a whiner. A callous and contemptous blow in order to restore sanity in their own little world.
I jap-slapped Ted for complaining about sprinkles on his donuts. Then I jap-slapped Jessica for being so stupid as to agree with Ted.
A highly technical, extremely dangerous martial arts move in which the individual performing the act strikes their victim with one side of their open hand, then immediately reverses the course and brings the other side of their hand accross the victims face.
My wife wouldn't stop sobbing after her cat died, so I jap slapped her and put her to work on the dishes. Sometimes you have to go that extra mile to help with the healing process.