You are attractive, interesting, or have something special about you that makes you stand out.
It can be used to describe a person's appearance, personality, talent, or overall presence.
Example:
"Wow, that new girl in class really got it going on."
This means the speaker finds the new girl attractive, interesting, or maybe she has a certain confidence that makes her stand out.
Origin:
The phrase likely originated in the 1990s and became popularized through hip-hop and R&B music. It's a playful and informal way to acknowledge someone's attractiveness or positive qualities.