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.
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.
by Norge August 11, 2010
 Get the Jack-Smackmug.
Get the Jack-Smackmug. by OZlificent June 18, 2020
 Get the ash jackedmug.
Get the ash jackedmug. Oh my lord....THERE'S a guy jumping off the roof with a woman on FIYA! . He's springheel jacking!! LOL ^_^
by Pantsface June 12, 2006
 Get the Springheel Jackingmug.
Get the Springheel Jackingmug. by Steve and doug October 2, 2019
 Get the Urinal jackmug.
Get the Urinal jackmug. In the upper peninsula of Michigan this has been used to designate a male person, or descendant of such, who has immigrated from Cornwall, England. The feminine form is 'cousin jenny.' These terms are often capitalized.
by Silver dawn August 28, 2013
 Get the cousin jackmug.
Get the cousin jackmug. An extroverted, chaotic yet sweet puppy (not an actual puppy; he's a human) from New York who takes part in a band with his two brothers, Ryan (the keyboard smashing and ukulele strumming bicon please don't take the "bi" part in there seriously with this guy, his true sexuality has not been revealed and I just make unconfirmed assumptions) and Adam (the soft teddy/grizzly bear man who loves gummy bears and just wants to save the world), with the band name being AJR. This soft puppy boi is the lead singer of the band, and is also a multi-instrumentalist ๐ณ he plays the acoustic guitar, the ukulele, the tambourine, the drums, and loves a good game of ping-pong. I love this boi so ๐ฉโ๐๐๐๐๐๐
Hey look at that sweet, chaotic, extroverted, floofy puppy!! Wait, they're human?? Oh, that makes sense, it's Jack Met!
by LegendaryEy3bags  May 4, 2021
 Get the Jack Metmug.
Get the Jack Metmug. by brockett January 28, 2009
 Get the craper jackmug.
Get the craper jackmug.