Bikini

This emoji is most commonly used to express a feeling of relaxation, contentment, or summertime fun. It is popular among all age groups, but is particularly popular with younger users, who often use it to express their enthusiasm for summer activities such as swimming, sunbathing, and going to the beach.

This emoji is most commonly used on Instagram, Twitter, and Snapchat. It is not considered a rude emoji, although it could be interpreted as such depending on the context in which it is used.

The history of this emoji is relatively short. It was first added to the Unicode Standard in 2010, and was included in the first version of Apple's iOS software in 2011. Since then, it has become one of the most popular emojis, and is used to express a variety of emotions and ideas.