to describe the sound of something wet meeting something hard.
For example, I am sitting here and all of a sudden I hear this noise that I describe as "sloucky". It turns out that Other Cousin has her finger in her mouth and the sound I hear is wet finger hitting hard tooth.
Yessss I know I am bothered by weird things, but going through the world wearing dark shades over my eyes (to protect me from bright light) and ear plugs (for weird noises) and a clothespin on my nose (because on random occasions the smell of someone's earwax is so strong it makes me want to gag) is no way to go through life.
Instead I'll just make up words like sloucky.