Fucha or Fuszka is work that is done without any contract. Mostly it is illegal work since nobody is willing to register it to tax collectors. Fucha is larger job, that can go for months. Fuszka is usually for day or two. This is very common world. This do not mean smuggling, or killing people. It is normal job, but both sides want avoid taxation. Internet tell me that odd job is a term to translate it. Edit: There is also Fuszerka, with means work done badly.