Overusage of hashtags; when a person uses an excessive amount of hashtags in a post on websites like Instagram, Twitter, or (to everyone's horror) Facebook.
Related to: hashtag abuse
Person 1: Just got promoted! #manager #ilovemyjob #promotion #bringinghomethebacon #movingonup #skillstopaythebills #imgoingplaces
Person 2: Hey man, congrats and all, but no need for the hashspaz!
A person who uses excessive amounts of hashtags on their Instagram/Twitter posts. These hashtags include but are not limited to writing each element of a sentence with a hashtag in front of it. Hashslags frequently commit this atrocity to receive as many followers/likes/retweets/loves as possible from other social networkers.
"Pic of me in the toilets of a club with ma friend" #me #in #the #toilets #girl #eyes #boobs #legs #heels #friend #love #club #nightout #nightclub #happy #pink #selfie #yolo #hehehe #.