The Cheezburger Network has added another popular site to its Internet conglomerate. The publisher has bought Know Your Meme.

Know Your Meme is the go-to site for looking up the origin and meanings of all the trends on the Internet. For example, the site will tell you how Charlie Sheen’s mention of “tiger blood” in an interview with “20/20” caught fire on Twitter, worked its way through sites like Cheezburger’s The Daily What and now enjoys a third life as a much-sampled clip in YouTube music videos.

Cheezburger — which runs the LOLcats site I Can Haz Cheezburger?, FAIL Blog and The Daily What among other sites — wrote in a news release that it looked to acquire Know Your Meme as a natural complement to its wacky family of sites.

Ben Huh, chief executive and founder of Cheezburger, said that the acquisition lets the company do more than just inject a little goofiness into your day. “We can help the public understand the origins of memes and how content goes viral on the Web,” Huh said in the release.

Huh also helpfully defines a meme in the release, and gives a pronunciation guide — it rhymes with team:

An Internet meme is a piece of content or an idea that’s passed from person to person, changing and evolving along the way. A piece of content that is passed from person to person, but does not evolve or change during the transmission process, is considered viral content.

The deal between Know Your Meme and Cheezburger closed last Monday, according to CNET. While it’s tempting to think of the Cheezburger Network as just a source for goofy pictures of cats, tapping into the Internet culture is worth big bucks. The group just closed a $30 million round of funding.