A bottle of nail polish, or colored nail polish being applied to finger nails.
Sometimes used at the end of a sentence to display an air of nonchalance.
Nail Polish was approved as part of Unicode 6.0 in 2010 and added to Emoji 1.0 in 2015.
The Nail Polish emoji supports skin tone modifiers. A yellow (or other non-human) skin tone should be shown by default, unless an emoji modifier is applied.
Platforms without support for emoji modifiers display a missing symbol character (box with a cross, alien, or question mark in it) next to any modified emoji.