thrash
/ˈthrash/
verb
to beat soundly with or as if with a stick or whip : flog
to defeat decisively or severely
to swing, beat, or strike in the manner of a rapidly moving flail
thrashed the visiting team
noun
an act of thrashing
rock music (such as heavy metal or punk rock) that is extremely fast and loud
phrasal verb
to talk about (something) in order to make a decision, find a solution, etc.
They had a meeting to thrash out their problems.