I made a comment and received the following reply:
Ha ha! Go get some life you stupid.
I know that this is some kind of insult. But what does "get some life" exactly mean?
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The phrase is usually "get a life" rather than "get some life." The person who says this feels the person to whom it is said is wasting his or her time on something. Wikipedia has good examples:
Implied in the taunt is to act normal (whatever that is!) or mainstream.