Meaning: If someone is "in deep", they are deeply involved in a situation.
- Candy knew that she was in deep when she realised she was spending more time in Steven's apartment than she was in her own.
- Before I knew it, I was in deep. I'd already invested fifty thousand dollars in the project, and I was thinking of investing even more.
Larry said he didn't know the guys in the drug gang, but the police were sure he was already in deep with them. They thought he