Top definition
Someone with an Instagram account who posts no photos. Rather, they have the account so they can follow others, and stealthily stalk their posts, without contributing any of their own.
"I didn't know Steve had Instagram?"

"Yeah, but its totally a ninjagram account. He follows 100 or so people, but hasn't made a single post himself."
by whatevertrevortrevor January 20, 2014
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