have a lash at (something)
To try something, often for the first time. Primarily heard in Australia, New Zealand. A: "Do you want to try driving my car, to see how you like it?" B: "Yeah, sure, I'll have a lash at it." I don't usually like hot tea, but it's so cold out that I had a lash at it today. Why would I let you have a lash at my motor if you've never fixed one before?
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