In the Cybersix world, the glowing green liquid that gives life to all Dr. Von Reichters genetically altered creations.

In the comic books by Carlos Meglia, it sort of replaces blood in all Von Reichter's creations, and Cybersix actually bites the necks of Fixed Ideas (creations of Von Reichters) and sucks out the sustenance like a vampire.
In the toned down, suitable for all ages animated TV show, Cybersix simply gives the Fixed Ideas a good whack to the head, killing them, and they disolve into a puff of smoke, leaving behind their clothes and (somehow) a glowing metal and glass vial of green liquid. I'm not entirly sure how this is suppost to work, but I like the first idea of neck-sucking better.