Bill Maher said this one on his show last week, referring to Nate Silver’s analysis of the election and why people should listen to him. It is a mashup of “crunch the numbers” (performs numerous calculations) and “crack the code” (solve a difficult problem or mystery). “Crunching” and “cracking” are both similar sounding words (lots of onomatopoeia going on here), contributing to the merry mixup. A code usually involves numbers, so that might have been swirling in the speaker’s brain at the time. Another tip of the crack to Mike Kovacs who heard this one.