LWK stands for low-key mainly, however, in other contexts, it might mean 'Love with Kisses' or even 'Last Week.' For example, if you say, 'LWK, that was fun,' it is a way of saying you enjoyed something without making a fuss over it. However, if you were to say, "LWK, I Miss You," it would be in terms of affection. LWK meaning in text depends contextually upon understanding; thus, always remember to consider who you are talking to and under which circumstances so that the message would be clear.