aestheticsymbols
Use in a combo

Smug copy & paste

(¬‿¬) is smug, a plain-text Unicode symbol built from several characters from the Basic Latin and Latin-1 Supplement and General Punctuation blocks. On Aesthetic Symbols it lives in the kaomoji & emoticons collection. As plain text it takes on the font and colour of wherever you paste it — a bio, a username, a caption or a stream title.

Unicode
U+0028 U+00AC U+203F U+00AC U+0029
HTML entity
(¬‿¬)
CSS content
\28 \AC \203F \AC \29
JavaScript
\u{28}\u{AC}\u{203F}\u{AC}\u{29}
UTF-8 bytes
28 C2 AC E2 80 BF C2 AC 29
Made of

U+0028 ( · Basic Latin

U+00AC ¬ · Latin-1 Supplement

U+203F ‿ · General Punctuation

U+00AC ¬ · Latin-1 Supplement

U+0029 ) · Basic Latin

Will it show up? · Long-established text symbols

Plain-text characters from blocks that mainstream desktop and mobile fonts have covered for years. These are the safe ones.

Worked out from how each character is encoded, not from a test on a real device.