LB stands for "like back" and is commonly used on Instagram. If a person comments on your picture or video with "LB" he is asking that you like one of his posts too.
LB is seen as a polite way to ask a person to return the favor of a like, similar to the "I scratch your back, you scratch my back" sentiment. It is typically done to people with a lot of followers by people who want the popular person to like their own content in order to gain recognition.
"You look great in that dress! LB."
|Updated||October 4, 2017|