adjective \hash-tard\
a. used to describe a person who has forgotten that they are posting on Facebook rather than Twitter and have used hash-tags in their post.

b. a person who intentionally uses hash tags in their posts on Facebook in an attempt to look cool or clever.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.

Any person who uses more hashtags than actual words in their social media posts.

Someone who uses a shit ton of unnecessary and overly specific hashtags, especially on Facebook. Often trying to make a photo funny, rather than organizing conversations. Please refer to www.howtohashtag.com on the proper usage of what was once known as the pound sign.