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Trump social media site brought down by Iran hackers
(htxt.co.za)
This is a most excellent place for technology news and articles.
I think a better definition would be "achieve something in an unintended or uncommon way". Fits the bill on what generally passes in the tech community as a "hack" while also covering some normal life stuff.
Getting a cheaper flight booked by using a IP address assigned to a different geographical location? Sure I'd call that a life hack. Getting a cheaper flight by booking a late night, early morning flight? No, those are deliberately cheaper
Also re: your other comment about not making a reply at all, sometimes for people like us it's just better to not get into internet fights over semantics (no matter how much fun they can be)
Your definition is probably better. I can very much vibe with that.