Hello, I was hopping you could help me out here, maybe point me at a tutorial or something, I'm trying to achieve the effect of dripping saliva from a beast's mouth/

This is what I have in mind:
prdart.deviantart.com/art/Eat-This-98555718

I'm new to postworking so I have no idea how to even start, and I'm not sure how to look for a tutorial for something so specific.

Thanks!