When a jew avoids an important obligation on Saturday because it is the sabbath. He or she is "Pulling a Koufax".
-Making reference to the great Jewish baseball pitcher Sandy Koufax who had to miss a world series game because it was a high holy day, and put his team in jeopardy of losing.
David: I can not play golf this saturday.
Larry: Why can't you play golf on saturday?
David: Its the sabbath, the most important day of the week for us jews.
Larry: So you are Koufaxing me?
David: I have to respect the sabbath!
When a very good or best player on a team doesn't participate in a game due to restrictions put on him by Judaism.
first heard on Season 8 Episode 3 "Palestinian Chicken" Curb Your Enthusiasm.
Examples: Yom Kippur, Shabbat, etc
Also: see "kreiting"
Josh Hamilton: Are you seriously not playing tomorrow?
Ian Kinsler: Can't, I'm koufaxing it because of the high holiday.
Tyreke Evans: Your kofuaxing it tomorrow for Shabbat?
Omri Cassri: Yep, Friday Night...cant play. Unless you convince my rabbi to let me.
Tyreke Evans: Nah, youre not that good.