* Formal: The committee nixed the proposal due to budgetary concerns.
* Informal: I nixed the idea of going to the party because I was feeling tired.
* With a playful tone: My friend nixed my plan to wear a funny hat to the wedding.
* In a past tense context: The CEO nixed the deal at the last minute.
Remember: "Nix" is a slang word that means to reject or cancel something. It's often used in informal contexts, but it can also be used in more formal situations depending on the tone.