(v) To prematurely press enter on a Tweet before completing the sentence, most often resulting in other Twitter users finishing the sentence by retweeting. The coinage comes from journalist Mark Hemingway, who had prematurely pressed enter on a tweet starting "We."
I heminated and now everyone's retweeting the abbreviated sentence. Hopefully it doesn't wind up in urban dictionary.
by philolojest October 31, 2011
Get the heminatemug. 
Get the Heminmug. by KNowledgeeeeeeee August 21, 2017
Get the Heminmug.