Confessions of a growth hacker: If people don't hate you, you are not growing.
orangethirty.blogspot.com
orangethirty.blogspot.com
(Edit: grammar)
For those that would disagree, please tell me what would differ on a growth hacker's resume vs. a marketing professional's resume. A big clue that they are the same role is that both jobs would list user acquisition numbers as a key metric of their work efficacy.
A growth hacker:
builds his/her own tools (including software)
is always developing new marketing tools
works to combine conventional with new
Its not a new term, but has been getting some attention in the past years.