Oh Long Johnson is a viral video of a cat growling in a manner that sounds like "human-like gibberish", including the phrase "oh Long Johnson". The video first appeared on television on America's Funniest Home Videos in 1998. In 2006 it was posted to YouTube, and by 2012, videos of the cat had been viewed 6.5 million times.
In the clip, the cat is growling in reaction to the presence of another cat. Know Your Meme interprets its vocalisations as:
The original video has been widely imitated, with remixes and merchandise. The video has also found recognition in non-English-speaking countries.
In 2012, the video was featured on a South Park episode titled Faith Hilling.
References
Oh Long Johnson Wikipedia(Text) CC BY-SA