If you’re considering a campaign or blog post related to #Linsanity, abandon it.

The craze is over, dead, finito. Left in its wake are millions of tweets, a poorly received Sports Illustrated cover, tons of headlines, and one very sorry headline writer.

According to Friday’s New York Post, New York Knicks point guard Jeremy Lin is no longer a phenomenon. The NBA team replaced its coach, and the new head honcho is reportedly not that crazy about Lin.

The Post’s headline says it all: “R.I.P. Linsanity.”

The New York Times also chimed in, indicating the declining sales of Lin’s jersey mark the end of the craze.

In case you missed the pop culture phenomenon that is/was Jeremy Lin, the young guard out of Harvard burst off the Knicks’ bench and helped lead the team to seven straight victories, capturing the attention of the media and the Twitterati. As a result, the hashtag #Linsanity became a trending topic. PR Daily published a story on the viral marketing lessons from Jeremy Lin (and Tim Tebow).

The hashtag has seen a bump today because of the declaration of its death, but unless Lin pulls out more heroics on the court, consider this the end of a meme.

The lesson: Social media is a fickle lover.