To search the Urban Dictionary for a word or saying that someone has said to you, yet is not currently available in other mainstream dictionaries.
Tonya: "Michael is out of the office today, he said he was having a foreskinaftskin operation?"
Jill: "Well, I did not find anything on the medical sites, let try urbanwordin it."
Tonya: "Awwww, he must REALLY love me...Grandpa Swartz and Uncle Finkelbergmanstein will be sooooo excited to meet him"
A group made up exclusively of anyone who lets the number of thumbs up/down determine whether or not they think an Urban Dictionary word is of actual quality.
Coming from "Urban" as in "Urban Dictionary" and "herd" as in "herd mentality."
"Hmm, I'm not sure if I think this word is particularly funny or clever. But wait! It has 650 up votes and 37 down votes. I think I'll give it a thumbs up!"
"Wow, I think that word is hilarious, but it has 103 up votes and 512 down votes. I guess it isn't funny after all... I'll give it a down vote."
... These are primary examples of people in the urbanherd.
When a person follows trends mindlessly and just wears them all together without having their own sense of style. Usually they just buy a whole bunch of stuff at Urban Outfitters and let the store tell them what's hip instead of figuring it out on their own.
That girl in the "ironic" T-shirt, neon leggings, and matching Ugg boots is seriously urbanotarded.