When one social media user places a hashtag (#) before a word or string of words in order to make it a 'trending topic', and another social media user antagonizes the 'topic' in the form of his/her own hashtag topic
Person 1 (on twitter): "Listen to song 'abc'. #song'abc'isawesome"
Person2 (on twitter): "Song 'abc' is really overplayed. #song'abc'sucks"
Person1 (on twitter): "Wow @Person2, straight hashtagony!"