I found a post mentioning "SuperBallistic Common Lisp" from 2015, perhaps that's where you remember it from.

> SBCL goes SuperBallistic! I have hacked together an SBCL port for the IBM BlueGene/P supercomputer's Compute Node Kernel (CNK).

https://sourceforge.net/p/sbcl/mailman/sbcl-devel/thread/AAN...