Gooncher
When a girls vagina is so big it looks like a goonch catfish's mouth laying on it's side.
Will: Hey, check out this picture of my girls vagina, does it look big to you?
Mike: Wow, dude, your girl has a huge gooncher, be careful when eating that, it might eat back.
Mike: Wow, dude, your girl has a huge gooncher, be careful when eating that, it might eat back.