Scum, scumbag, vile wretch; frost, slush (historical). A highly offensive, contemptuous noun used to describe an utterly despicable, loathsome person, or a group of such people (as it can function as a collective noun). Historically, it shares a linguistic root with мороз (“frost”) and originally referred to cold, slimy sleet or filth. Over time, it evolved into a scathing moral judgment.
Человек со всеми разный… с кем-то мразь, а с кем-то классный…
The person acts different with everyone… scum to some, brilliant to others…
(Антоха @ privet.ru, 101/2010)
