It all started when The Late Show dropped a tweet in reference to one of Stephen Colbert's opening jokes on Friday.

If you haven't been following, pharma-bro Martin Shkreli is in the news again for endorsing the price spike of an EpiPen made by Mylan Pharmaceuticals that went from less than $100 to $608.61.

Martin Shkreli took notice to The Late Show tweet and responded to the joke. Soon after, Stephen Colbert (from his personal Twitter) responded to Shkreli in very Colbert-like fashion.

The British phone company, Tesco Mobile, has one of the most savage Twitter account on the internet.

Most people think it's fun and games to joke about Tesco's crappy coverage, or even the obnoxious auto-generated voice mails, but Tesco Mobile doesn't play.

Just take a look at some of these recent brutal comebacks and see for yourself.

If anyone is interested in a DIY project this weekend, Staples has you covered!

Kris Jenner went to Twitter to promote her $175 "limited edition" 'Elegance' necklace and nobody was interested.

The internet was already convinced the Kris Jenner exclusive was made out of paperclips, but it was the Staples Canada Twitter account that stepped in and delivered the finishing blow.

Keep your $175 and head to aisle 7.