Is a cuss phrase for Steve Huffman (u/spez), the current CEO of Reddit due to his own site policies and decisions. You'll likely have your account suspended on Reddit if you cuss him or use the phrase for a name of subreddit (this is like #FuckElonMusk on Twitter, #FuckMarkZuckerberg on Facebook, and #FuckSusanWojcicki on Youtube).
Never trust these CEOs, they'll remove you anytime if they want. Fuck Spez, Fuck Elon, Fuck Zuckerberg, Fuck Susan Wojcicki. Use alternatives and watch these companies run into the ground.
spez is the shitty CEO of reddit that turned from building a community for sharing into a money greedy pig. You're a spez if you disregard the majority of your communities input and put yourself first.
Spez did an AMA where he only answered 14 questions then accused the creator of Apollo for blackmailing him