backward mung snort
The act of swallowing excess from a mung milking incident. This is done by tilting the head back and snorting inward via the nose in combination with sucking in via an the lower lip - thus effectively cleaning the mung milk from the entire area between nose and upper lip.
Man, did you see that snot - snorter? That crumb did a backward mung snort and got rid of his whole ghetto baby mustache in one shot!