It's really hard for me to figure out if you were sarcastic or not with your "never heard of the term"? You must be either young or never visited slashdot for it not to be sarcasm. It was a running joke in slashdot on every comment section to have a Beowulf cluster of whatever was mentioned in the article.

We're just getting old - https://trends.google.com/trends/explore?date=all&q=beowulf%...

Not sarcastic at all, just a young-ish person who never used slashdot that much.