squared up with exclamation mark symbol.
Copy and paste this emoji:
symbol
UP! button was assigned codepoint in Unicode 6.0 on 11 October 2010.
UP! button was included in Emoji 1.0 on 04 August 2015.
🆙 U+1F199
:up:
㊗ Japanese “congratulations” button
🈵 Japanese “no vacancy” button