劍橋詞典

written abbreviation for rolling on the floor : used, for example in an internet chat room , to show that you think something is funny
在地上打滾；好笑，好玩（網(wǎng)絡(luò)聊天室用語(yǔ)，rolling on the floor的縮寫，表示覺(jué)得某事很好笑） 返回 rotf