If you search on misspelled tags on tumblr, one of the more interesting ones is ‘hioster’ which is an adjacent-key misspelling of ‘hipster.’
The ‘hioster’ tag is flooded with this one image of a bird tattoo being repeatedly crossposted from weheartit.
People come across the weheartit image and blog it using the “Share to tumblr” button which autopopulates their posts with the bad tag.
Suddenly, hioster is flooded.
Also suddenly, ‘doge’ has an interesting cousin related in form but not in intent.
It’s just A Giant Bug of Dumb but it’s an incredibly fascinating one.