Guy 2: Fuck that. I'm going to double up with both of them. Stop being such a beta.
2. A person who proofreads fiction.
3. A type of fish.
2. My lovely beta caught my grammatical errors in my story.
3. Sally used to have a beta fish, but her cat ate it.
Sherlock: Yeah I went beta on her, at first I was alpha but later I became beta after she rejected me