From Longman Dictionary of Contemporary Englishbeat/kick etc the shit out of somebodybeat/kick etc the shit out of somebody spoken not politeHITto beat, kick etc someone so violently that they are badly injured → shit
Examples from the Corpus
beat/kick etc the shit out of somebody• Like in the Teamsters, where they beat the shit out of people in parking lots.• I had to pretend, because he was beating the shit out of me. 