Someone in-game threatened me?! Please help

Hey, I just finished a game and these 2 duo bot, Lucian and a Soraka were playing. So, I was heavily lagging and Lucian gave me an attitude and was rude to me so I was rude back to him. He then said "I have no problem with doxing you". I didn't know what doxing(no I don't mean dosing I mean DOXING) was so I didn't really care. I've now been reading about it(if you don't know SEARCH IT UP) and is this actually possible through league, and if so what should I do? I really hope this was a joke. Please help. P.S- Bout to head into game so i'll check this in like 30 mins
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