A #Hashbag is someone who is a douchebag and expresses it through hash tags.
"Talkin to you right now gurl is like yellin at the wall â#pointless â#getoveryourself â#enemy â#wontrememberyou â#ontothenext â#straightwasteofmytime â#bhamhoesalwaysonthesameshit Where my real ladies at? â#makesomenoise"
8 hash tags in one post? You really are a #Hashbag.