Russian for "Being full of SHIT".
I don't believe anything that guy says, he is so HESSEK!!
Hessek: One who leaves large amounts of skat (shit) everywhere he roams. A hessek will typically pee and crap in their own back yard. Usually appears as a thin, lanky, person with braces who always has crap stuck in the braces. Likes to wear women's underwear and tend to be child molesters.
That Rick, he is such a Hessek. Keep your kids away from him.