LOL的别名叫小三

This is somewhat playful and possibly sarcastic. 'LOL’ here refers to the popular multiplayer game League of Legends, which some players might jokingly call “Xiaosan” (meaning 'the third party,' a term often used for mistress). It implies spending so much time on the game that it feels like cheating on life responsibilities. This netname can be considered controversial and specific to certain gaming communities.