Where does come from?
Officially called Hundred Points, this emoji commonly goes by 100, Keep it 100, or Perfect Score. It was introduced in Unicode 6.0 in 2010. 100 emoji originates from teachers’ use of 100, often written or stamped in red ink, to indicate a perfect score on an assignment.
Keep it 100 is a slang phrase, apparently, from use of one-hundred percent meaning “absolutely,” “perfect,” and by extension “authentic,” or “real.” The 100 emoji is sometimes used in place of or alongside the phrase keep it 100, or “keep it real.”
On Snapchat, 100 emoji appears next to a friend’s name to represent a 100-day Snapstreak, i.e., you message that person too much.
Who uses ?
The 100 emoji is commonly used on social media for an excellent performance, especially by professional athletes (e.g., “My respect for Lebron James transcends sports. He will always be the greatest to me, debate someone else. 💯”).
They don't wanna see you at your greatest 🙄💯
— ⓒⓗⓘⓝⓐ (@mone_china1) May 16, 2018
It is also used to represent feelings of solidarity, loyalty, truthfulness, transparency, and a sense of community. On Twitter, for instance, someone might include the 100 emoji in a message to celebrate a person’s success, such as passing their driving test, getting a promotion at work, or, most literally, earning a perfect score in some activity. Another person might motivationally tag a message of love and support for a friend or family member facing adversity with the 100 emoji.
If you my dawg, then just be my dawg and don’t you change on me💯🗣
— 18. (@ayethatsnayy) May 16, 2018
As an emphasis marker, 100 emoji can be used to show enthusiastic support and approval for an idea or concept (e.g., “I absolutely agree. One hundred percent. This is on point.”).
You gotta work hard for what you want in life 💯💯💯
@BreadBoi, February, 2018
If I call you my friend I’m supporting you thru whatever...I wanna see my whole team eat 💯💪🏽
@tayjaniece, February, 2018
In 2016, Chloe Kim became the first person under the age of 16 to win three gold medals at an X Games and the first woman to land back-to-back 1080 spins in a snowboarding competition. Not to mention the second person ever to receive a perfect, 100-point score. And we'd give her Twitter game a solid 100 emoji.
Melissa Minton, teenvogue.com February, 2018