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3.
1. Verb. To be banned for ongoing play in an online video game for some action of insignificance, typically by some fat power hungry nerd who thrives on exercising his online powers.
My boy Nameless One just got instabanned for saying google.com in the main chat room by faggot Adept_Lynx!
by The Goat July 25, 2005
 
1.
-verb
A compound word from "instant" and "ban"; to be banned instantly, as from an online game or web forum.

-adjective
A behavior for which there is zero tolerance, which will likely result in an instant ban.
As verb: You'll get an instaban for that if you're not careful.

As adjective: Posting child porn is an instaban.
by Termy July 29, 2007
 
2.
verb (used with object), instabanned
1. to prohibit, forbid, or bar from instagram due to inappropriate or excessive use of the app through posting an inordinate amount of vain pictures which may include self-indulgently sentimental couple shots with hashtags such as #together #awesome #cutecouple or #togetherforever

2. Also appropriately used as a hash tag when a instagram user abuses other users feeds with images of puppies or baby animals
eg. Ugh I'm so going to #instaban Polly, tenth picture of her stupid pug she has posted today!
by SUzyQ March 28, 2014