No thing; not anything
To prevent or forbid authoritatively
To be unwilling to accept, consider, or receive
Executive producer Mike Lazzo, believing that the episode featured too little of the Space Ghost, elected to nix the script for production.
Nix with German translation (Drugulin, Leipzig, 1889).
Once you've established a budget, and you've looked at the expenses, you may be able to nix a few of the ideas right from the start.
In fact, nix the T-shirts altogether; they may be casual, but they certainly aren't business.
nix, nivis, snow) is adopted from the French dialect of the French Alps; firn is German, meaning "last year's (snow)."