What does "sock it to me" mean?
In Fight Club, the character played by Brad Pitt wears a T-shirt with the message "sock it to me" at certain point of the film. I have looked it up in translators but the answers that I get aren´t satisfactory!

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That particular shirt (in that font) is a reference to a 1960s  tv-show called "Laugh In."   "Sock it to me" was their catch phrase.  (When someone said it on the show, something silly would happen to them.)

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"Come on, let me have it!" "It" could be something physical like a punch or non-physical like a tennis serve. It's kind of like the expression "Hit me with your best shot" or "Show me what you've got".

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