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1.
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
 
2.
a combination of "fake" and "instagram", a finstagram is a second instagram account that annoying white girls make. they often care too much about what they post on their real instagram (rinsta) that they feel the need to have a second, less public one. they also often post picture of them partaking in illegal activities.

stop
Ugh, this picture won't get enough likes but I look so cute... I'm gonna finstagram it!

omg we're smoking? gotta record this on finsta!

teehee ugly pic for finsta~!
by imfinstahurtyou January 07, 2014