Someone who suffers from the overuse of hashtags in their social media posts. In the female of the species, they are referred to being a hashhag
by Exclusive Steve Figure June 15, 2016
an adjective describing an individual who contains much of their life on social media including the use hashtags abusively. These people are usually seen as outgoing, wear booty shorts, and use the word "like" as a filler word.
by Festello June 19, 2016