When a fat chick lifts her gut to reveal her cunt, she attempt s to shave her pubes but cant lift her gut (upper part of the gunt) high enough and consequently a line of pubic hairs remain after she finishes trying to shave. This line of pubic hairs is known as the cuntauche.
A custy mustache.
The nasty soft-haired mustache. Peach fuzz texture, but dark enough to be seen from far away. Usually sported by little white boystrying to be ghetto.
Pedro from Napolean Dynamite has a custache.
Prince has a nasty custache.
Your 14 year old brother who refuses to shave his upper lip has a custache