This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F44E prohibits a line break after it, if it’s followed by an emoji modifier.
The CLDR project calls this character “thumbs down” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: -1, bad, dislike, down, good, hand, no, nope, thumb, thumbs.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 👎︎ The character can be changed in appearance, if it is followed by an emoji modifier. See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
A thumb signal, usually described as a thumbs-up or thumbs-down, is a common hand gesture achieved by a closed fist held with the thumb extended upward or downward, respectively. The thumbs-up gesture is associated with positivity, approval, achievement, satisfaction and solidarity, while the thumbs-down gesture is associated with concern, disapproval, dissatisfaction, rejection and failure.
Representations
System
Representation (click value to copy)
Nº
128078
UTF-8
F0 9F 91 8E
UTF-16
D8 3D DC 4E
UTF-32
00 01 F4 4E
URL-Quoted
%F0%9F%91%8E
HTML hex reference
👎
Wrong windows-1252 Mojibake
👎
Encoding: GB18030 (hex bytes)
94 39 D1 32
RFC 5137
\u'1F44E'
Bash and Zsh inside echo -e
\U0001F44E
C and C++
\U0001F44E
C#
\U0001F44E
CSS
\01F44E
Excel
=UNICHAR(128078)
Go
\U0001F44E
JavaScript
\uD83D\uDC4E
Modern JavaScript since ES6
\u{1f44e}
JSON
\uD83D\uDC4E
Java
\uD83D\uDC4E
Lua
\u{1F44E}
Matlab
char(128078)
Perl
"\x{1F44E}"
PHP
\u{1f44e}
PostgreSQL
U&'\+01F44E'
PowerShell
`u{1F44E}
Python
\U0001F44E
Ruby
\u{1f44e}
Rust
\u{1f44e}
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