Influenced by the recent trend for abbreviating celebrity names by using the first letter of the celeb's first name, with the first syllable of the celeb's last name (ie, Jennifer Lopez=Jlo)
Ray: Good luck with that, Jmac.
i.e. the act of being retarded or imitating mental retardedness.
2. Also, used in basketball when shooting six 3-pointers in a row.
2) "That kid just shot 5 3-pointers! One more and he'll pull a J Mac!"
J-mac now has an movie and book deal, with Disney. The Local McDonalds also served J-Mac's, not Big Macs for a few days. His catch phrase is "I'm hot as a pistol!"
Bonnie: Of course!
George: Sorry, J-mac moment!
Bill: (throws a paper towel away and misses, then tries again and makes it.)