From Longman Dictionary of Contemporary Englishhave a gohave a goBritish English spoken a) to criticize someone You’re always having a go.have a go at Will you stop having a go at me!have a go at somebody for/about something Mum had a go at me for not doing my homework. b) ATTACKto attack someone A whole gang of yobs were standing around, just waiting to have a go. c) SCCATCHto try to catch someone who you see doing something wrong, rather than waiting for the police The public should not be encouraged to have a go. → go
Examples from the Corpus
have a go• So stay with me and have a go.• Mrs James will certainly have gone home, but Gerard will still be up until after the last guest has gone.• The finish could have gone either way.• He says that when burning oak powder it's possible that a spark could have gone astray.• Presidential families have gone to great lengths before to preserve the privacy of their personal correspondence.• David kept saying she should simply not have gone up there ... but how could she not have gone, being Harriet?• Since then, scientists have gone back to the lab and improved it.• Maybe he should have gone to work for a firm. 