have a go verb 3have-a-go adjective 1forms 3 verb3 •(UK, informal) To make an attempt; to try.I've never tried karate before, but I'm willing to have a go. •(UK, informal) To tell off (especially unnecessarily or excessively), to criticise.My teacher had a go at me earlier, just for missing one sodding homework. I was fuming. •(UK, informal) To attack someone physically; to have a fight.I heard you had a go at Jack the other night. have-a-go adjective1 •(UK) daring, courageous, particularly in the face of unexpected adversity. formshad a go · having a go · has a go