Originally Posted by
KorvinStarmast
You can call it a variation on a theme, or a colorful usage. It for sure is not literal usage.
As I explained, "betting the under" indicates "not likely" and "betting the over" indicates "likely" ... in this usage (idiomatic?)
It has bloody fork all to do with gambling in that context.
Other colorful phrases you may be familiar with:
Putting something in the oven, and then "nuking it."
No actual nuclear reactions are in play.
Being so mad at someone than one exclaims "I'm gonna kill 'em."
No actual intent for homicide exists.
FWIW: It is quite possible that this bit of slang is unique to some parts of Texas ... it is certainly where I picked it up.