Apparently NIXY is a word.
nix·ie also nix·y (nks)
n. pl. nix·ies Slang
A misaddressed or illegibly addressed piece of mail, therefore undeliverable.
"Well, i can make NI(X) through that TW, that guy gave away 33 points. But hey, with that TL its too tempting to not try and goofball something, lets start with Y. Oh. Lol, 60 points, cha ching"