Top definition
When a person starts bitching on an Instagram post.
Ellen: Just ate birthday cake with my friends! So yummy :D
Natalia: OMG, you had birthday cake?! Why didn't you invite me to your party?! You're so mean! I hate you!
Ellen: Jeez Natalia, stop instabitching on all my posts.
by )_Me_( February 03, 2013
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