When people online are being creepy, the people will comment/reply and say “FBI open up!” showing that if they used that behavior IRL they would probably get arrested.
‘I’m 40 and I like 14 year olds.’
‘FBI OPEN UP!!’
by Tom Holland’s Girlfriend January 28, 2019
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Popular shortened version of "open up a can of whoop-ass," a statement generally used as a threat, but can refer to a beating/act of domination that occurred in the past.
1. "If ya'll don't stop your bitchin' I'm gonna open up a can!"

2. "I'm finna open up a can on your stanky ass"

3. "The kids were so out of control I had to open up a can right in the middle of the 7-11!"
by naborsG January 14, 2006
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to expose the inner workings of a process or financial books. Typically used in the Tech industry.
we are meeting with the Venture Capital partners tomorrow, it's time to open up the kimono.
by treetopflyer February 14, 2012
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To casually use another person's web browser while not changing any of their open windows. Most commonly this phenomenon occurs in a casual setting with a lap-top style computer.
Guy who needs to check email: "Hey, you mind if I open up a tab?"

Gal not using computer: "Sure, just make sure you close it out when you're done."
by DoctorZee November 22, 2009
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Private spies to help you track down what the fuck your best friend is doing. If you need help, contact us or leave a like.
Boy 1: We need some Open Up Spies to track down our best friend
Boy 2: Where is our best friend?
Boy 1: In the forest, go get them.
Boy 2: Why?
Boy 1: Because I said so.
by alpaka fbi open up spies April 21, 2020
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