An open handed, back-hand slap to the temple. Not intended to knock someone out, but instead, to make someone appreciate your point of view in a forceful manner so they eventually agree with you. This is considered a more intimidating and more painful form of "Point Making" as opposed to the more traditional and less painful open hand cheek slap.
Jeff: Hey Greg, Jimmy owes me some money and I asked him to pay me and he laughed.
Greg: He laughed?
Jeff: Yes, he laughed!
Greg: You need to Jack-Smack him and let him know you are serious without knocking him out.
When someone takes an unnecessarily long hit off someoneโs vape or cart and taxes it, often killing it in the one lung destroying hit they take.
He just jack smacked my juul and now itโs dead
4๐ 1๐
Not having or doing anything
"Do you have money? I don't have jack smack"
"What did you do last weekend? I didn't do jack smack!"
7๐ 11๐
Smacking your enemy in the face with your cum
After pissing home of he jack and smack the road rage drive