A situation where a friend looks through a group chat from since they were last online on a social media app such as Instagram, and continually likes the messages that they agree with or find funny that they have missed as a result of being inactive.

a Facebook activity in which participating users hit the "like button" on all the items of other participating users in the status feed. Based loosely on the "Like for Like" principle except no one keeps count. Users "Fall off" the like train and will no longer receive likes from the train once they stop reciprocating.