Top Definition
A texting or chatting term used to abbreviate the phrase "I'm not sure, yet."
John: When are you going on that date?
Bri: Insy.
by Hanh-Nhi Pham January 12, 2010
1 more definition
pronunciation: in-zeez

Indicates the request of monetary compensation equally from all parties invited to share some type of food or event.
Me: I'm want some pizza but it's too big for me to eat alone. Anyone want insies?
Jane: Sure I'll go in on a pizza.
John: Pizza sounds great!
Mary: Not for me thanks, I'm lactose intolerant.
by scifivxn January 18, 2006

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