Answer:
The meaning of the allusion in the sentence "Smart Phones Becoming Big Brother" is a threatening power that monitors all aspects of people's lives.
The term "Big Brother" in the original source, George Orwell's novel 1984, refers to the totalitarian leader who is always watching and controlling the citizens in a dystopian society. The use of "Big Brother" in the headline suggests that smartphones are becoming a powerful force that can monitor people's behavior, track their movements, and collect personal data, potentially posing a threat to individual privacy and freedom.