"To let the genie out of the bottle" - a surprise, emotional release, splash suppressed negative emotions; "Genie" - a sign of magic (effortlessly) wish-fulfillment.
To see a genie in your dream, represents your creative and mind power.
Wish fulfillment. Perhaps you have a need that is not being met. Maybe you can grant yourself a wish? A mean genie could represent:
You sabotaging yourself
Someone in real life offering you a favor, when you fear they're offering in bad will