Keeping the quotation marks around the L + ratio so it’s “L + ratio” will get you results for your search.

L means loss meaning you took the loss/said something dumb. Ratio means the ratio of replies to likes is high meaning people also think you’ve said something dumb and are arguing with you about it. Comes from Twitter but used more generally now (mostly ironically).

Loss + more replies than likes or a reply got more likes = L+Ratio.

It means you got an L (loss) and ratioed (higher count than the initial post you’re commenting on).

Also L + ratio + you fell off

It isn’t hard to google something with a plus sign and getting a good answer… just google it. :)

Shown answer from dictionary.com: “What is L + ratio? L + ratio is used as a mocking insult on social media, often in reply to a post or opinion considered particularly bad. The letter L is used as a slang term for loss (as in the opposite of win).”