The A320, like most modern airliners, does not have the capability to dump fuel. It is not uncommon these days for pilots to request airborne holding short of their destination in order to burn off fuel and get below their maximum safe landing weight.
Is there any good way for a pilot to increase fuel consumption? I would expect that if the plane would allow it the pilot could theoretically enter a steep climb at wide open throttle; if the thrust/weight ratio is less than 1:1 (as it is on any commercial jetliner) it should be possible to maintain stable airspeed in such fashion. On the other hand, that might not be very comfortable for the passengers, and might have safety problems besides. Any other alternatives?