To see or eat a plum in your dream symbolizes youth and vitality. The plum may also represent you self-image and the way you feel about your body. Perhaps the dream is a pun on being "plump".

To see a plum tree in your dream represents youth, vitality, and innocence. The dream also indicates that you will overcome some difficulties.

Plums, if they are green, unless seen on trees, are signs of personal and relative discomfort. To see them ripe, denotes joyous occasions, which, however, will be of short duration. To eat them, denotes that you will engage in flirtations and other evanescent pleasures. To gather them, you will obtain your desires, but they will not prove so solid as you had imagined. If you find yourself gathering them up from the ground, and find rotten ones among the good, you will be forced to admit that your expectations are unrealized, and that there is no life filled with pleasure alone.