From Longman Dictionary of Contemporary Englishgo at something/somebody phrasal verb informal1 ATTACKto attack someone or argue with someone in a noisy way The two dogs went at each other.2 START DOING somethingto do something, or start to do something, with a lot of energy Mary went at the task with great enthusiasm. → go→ See Verb table
Examples from the Corpus
go at • Harbury was young and ambitious and went at things with a daunting eagerness. 