In contemporary slang, “cap” can have several meanings depending on the context in which it is used. It is important to note that slang terms can be regionally specific, and the meaning of a term can vary depending on the cultural context. However, in general, when a girl says “cap,” it could mean one of the following:

- Lying or being dishonest
When someone says “cap” in this context, they are essentially calling someone out for lying or being insincere. It is often used in the phrase “no cap,” which means “I’m not lying” or “I’m telling the truth.” So, if a girl says “you’re capping,” she could mean that she thinks the person is not being truthful.
- Dismissing someone or something
Another way “cap” is used is to dismiss something or someone. In this context, “cap” means “I don’t believe you” or “I don’t care about what you’re saying.” For example, if a girl says “that’s cap,” she could mean that she thinks what the person is saying is nonsense or not worth paying attention to.
- Being too much or exaggerating
When someone says “cap” in this context, they mean that someone is exaggerating or being too much in some way. For example, if a girl says “you’re capping” when someone is bragging about their accomplishments, she could mean that they are exaggerating and trying too hard to impress others.
- Stopping or ending something
In some cases, “cap” can mean “stop” or “end.” For example, if a girl says “let’s cap this conversation,” she means that she wants to end the conversation and move on to something else.
It’s important to note that the meaning of “cap” can vary depending on the context in which it is used, and it can change over time as slang terms evolve. Additionally, not all girls use the term “cap” in the same way, and some may use it more frequently than others.
In conclusion, “cap” is a slang term that can have several meanings depending on the context in which it is used. When a girl says “cap,” she could mean that someone is lying, being insincere, exaggerating, or dismissing something or someone. It’s important to be aware of the context in which the term is used to understand its meaning accurately.