To beat up, to brawl, to pummel; to trudge through mud; to engage in anal sex. It has branched into several meanings: 1. in a physical or combat context, it means to heavily beat someone up or to engage in a chaotic group brawl (они начали месить друг друга — “they started pummeling each other”); 2. it describes trudging heavily through thick mud, slush, or snow (приходится месить грязь во дворе — “we have to trudge through the mud in the yard”); 3. in vulgar and crude slang, it is used metaphorically in sexual contexts, specifically referring to anal intercourse (often in the expression месить глину, literally “to knead clay”).
Судя по всему, его долго, очень долго месили сапогами и ботинками, прежде чем он отдал Богу душу, и это настораживало.
It appears that he was pounded with boots and shoes for a long, long time before he went to meet his maker, and that was alarming.
(Юрий Гайдук, Штрафбат. Закарпатский гамбит, 2013)
