To dream of being choked represents emotional suffocation. Feeling unable to express yourself at all or make your own decisions.
To dream of choking someone else represents your disinterest or hostility to someone else expressing themselves. It may also be a sign that you don't want someone else's ideas considered at all. Positively, it may reflect your attempt to cut of negative thinking patterns that stifling progress.
To dream of choking on food may reflect new ideas or situations you feel are causing more problems that you first believed. You may be having difficulty accepting someone else's ideas.
Example: A woman dreamed of being choked while laying in bed. In waking life she was very unhappy with her husband whom she felt was totally controlling her life.