look up any word, like blumpkin:
An awkward position used by a male person to orally satisfy himself sexually.
A position a man puts himself into, to be able to perform self felatio. A method where by the person backs his legs and back against a wall or other vertical object to enable a rolling of the hips downward to be suspended above ones head. Thus allowing the penis to be dropped into the mouth for felatio self satisfaction. Visually this could resemble a bid feeder used backward, hence the term "Reverse bird feeder".
by Dr. Penedrop February 19, 2011