>> The nerve agent VX is an oily liquid that is clear, odorless, and tasteless, and looks similar to motor oil. [0]
"Clear" and "motor oil" seem mutually-exclusive though.
Apparently what they meant was translucent, brown-tinted fresh motor oil. [1]
[0] https://www.webmd.com/men/commonly-known-chemical-weapons-ag...
[1] https://spectrumnews1.com/ky/louisville/news/2022/06/08/chem...
Or maybe they mean that it's tasteless (as in uncultured or gauche) to kill your enemies with nerve gas instead of a more elegant weapon.
https://en.wikipedia.org/wiki/Edgewood_Arsenal_human_experim...
The chemical agents tested on volunteers included chemical warfare agents and other related agents:
Anticholinesterase nerve agents (VX, sarin) and common organophosphorus (OP) and carbamate pesticides
Perhaps they mean that it makes this fun "holo" effect when mixed with water and spilled on flat surface?