A nomination is a vote cast by one housemate to put another housemate up for evicition. Everyone housemate can make two nominations and the two or more housemates with the most nominations cast in their name will be nominated for evicted. The nominated housemates then face a public vote and the housemate with the greatest percentage of the public vote will be evicted from the House.
There may be an exception to this process or a "twist". Examples include:
- New housemates who arrive sometime after Day 1 usually cannot make nominations or be nominated for eviction in their first week.
- The housemates that will face eviction are decided by the success or failure of a task set by Big Brother.
- A housemate is banned by Big Brother from making nominations one week for breaking rules, especially the rule regarding discussion of nominations.
- A housemate is automatically nominated for eviction by Big Brother for rule breaking.