I asked AI, and it said '11ONE' is an old-school internet meme / typing mistake joke, popular on early 2000s forums.
- Normally, to type an exclamation mark !, you press Shift + 1.
- If you type too fast or miss the Shift key, you get a 1 instead of a !. So a string like !!!!! would come out as 11111.
- Later, people started deliberately writing 11111 (or 11ONE) as a sarcastic, self-aware way to represent multiple exclamation marks.
- The ONE part comes from reading the digit “1” aloud – so 11ONE is a playful mis‑typing of !! or !!!!.
In the sentence you quoted (...!!!!!11ONE), it’s used
mockingly: it implies the poster is so excited or angry that they can’t even type their exclamation marks correctly. It adds extra sarcasm and old‑forum flavour to the already snarky reply.