U+0023 U+20E3 · emoji since 2010
The hashtag keycap is the # symbol on a button. It means hashtags, trending topics, and tagging a post so the world can find it.
It also covers the pound sign on a phone keypad and number shorthand. Mostly though, it is the internet's little label maker.
In texting, #️⃣ does not carry a widely used hidden or slang meaning, so you can usually take it at face value. People send it just as it looks, to add a little visual touch or set the mood of a message. Only a handful of emoji have a separate texting code, and #️⃣ is not really one of them.
Its official Unicode name is the Hashtag emoji. In everyday chat most people just call it the hashtag emoji or describe what it shows. Copy and paste it from the button at the top of this page.
The #️⃣ leads off a short phrase, and the rest of the words are written in cipher, every letter disguised as another emoji. Tap decipher to reveal the whole line.
Or make your own cipher in the translator.