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The over use of hashtags on twitter, most often when you use a hashtag in the form of a sentence or when you have multiple hashtags in a tweet or a combination of the two. Many people find this annoying when they attempt to figure out what they mean.
Examples of overhashtagging

1) permit permit permit permit #theroadsarentsafeanymorelol
2) watching 1D on Ellen!!#happy #lovethem #omg #soexcited
3) Just made cupcakes #ilovebakingsomuchitsridiculous #goingtoeatsomuch #chocolateismykryptonite
by ShenGirl November 20, 2012
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