1
general::
Phrase(s): a go at something
Go to a try at something., Phrase(s): go at someone or something
to attack someone or something; to move or lunge toward someone or something. • The dog went at the visitor and almost bit him. • He went at the door and tried to break it down., Phrase(s): a go at someone
Go to a try at someone.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Attack, especially with energy; also, proceed vigorously. For example, The dog went at the postman's legs, or Tom went at the woodpile, chopping away. This idiom is sometimes put as go at it, as in When the audience had settled down, the lecturer went at it with renewed vigor. [First half of 1800s]
American Heritage Idioms