The art of hijacking a friend's profile on the social networking application Grindr and using it to spam/flirt with random people the friend has no attraction to whatsoever.
James (21) steals his best twink mate Tom's (23) iPhone, opens Grindr and sends a suggestive message to StevetheBear (57).

Tom clearly would never have done this, had his phone not been "Grindrjackd".

James is therefore a "Grindrjackr".
by GrindrAddict September 02, 2010

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