Finstagram, finsta for short, is a mixture of Fake & Instagram. People, usually girls, get a second Instagram account along with their real instagrams, rinstagrams, to post any pictures or videos they desire. The photos or videos posted are usually funny or embarrassing. Only your closest friends follow this account.
Hey that picture you posted on your finstagram was so funny.

That picture is so funny you should finsta that.

Finsta that shit nowwwww!

Oh let's take a picture for my finstagram.
by Girls that are cool December 08, 2013
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Finstagram is a instagram account that’s setup by weird people to stalk you or troll you without you knowing. They create it and change the pictures so you don’t know who they are, but they post very personal things. It could include: You, pictures of you that you didn’t know they took, pictures of your family, your kids and more weird things you can’t post to a real Instagram account. It’s a pretty creepy thing to do these days. People can make them and create false personas with them. It’s a scary thing to imagine what someone can do when they make one.
“I want to see how he/she reacts to this comment or where he or she is, so I’m going to make a Finstagram to watch them from.”
by Urban Dictionary Ron April 24, 2019
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