I get heaps of IOI from a girl and i know she is interested(her sister told me she likes me), but she continually tells me to "shut up" I say something and she then starts talking.

Is this a shit test?
What should I do?
Why does she tell me to shut up? She is a bit spoilt.

That's a pet peeve of mine, I switch into 'dick mode' when a girl tells me to shut up, It's a sign of disrespect in my eyes.

If she's being playful, I call her out with the same playful tone, but I get my point across.

Women (especially the spoiled ones) think they can talk to people however they want because they've been catered to and have had their asses kissed all their lives...so this will happen often.

You need to start correcting this behavior from the very beginning. If you don't, they will start calling you out in front of friends/family and make you look like a 'chump'.

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Keep people off-balance and in the dark by never revealing the purpose behind your actions. - Robert Greene

What's the tone of her voice when she says it?
This can be said a few ways and I can't tell which from your description:

1. "L1k3 OMG, shUt Up!" said in a ditzy manner and followed by her being excited and taking over the conversation because it's something she is interested in.

2. "Shut up. Seriously." said in a dead serious tone. Where she is just being a bitch and cutting you off.

Either way, I can see how it would be annoying when you are trying to talk to her.

"You shut up. Back to the kitchen, female!"

Make sure it's in a playful way or you'll get slapped. It's always been golden for me.

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Your momma's so fat when she walked past the TV she was going to the kitchen to get cake 'cos she's fat.

"next time I want you to open your mouth, I'll tap my zipper"

the second option,

serious spoilt little kid voice.

is this an instant of her trying to dominate my frame?

should i just ignore it?

i don't think the replies would be effective as C and F tends to make her say it more.

Haha man that's golden, I gotta try that one.

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Your momma's so fat when she walked past the TV she was going to the kitchen to get cake 'cos she's fat.