Someone on Youtube who tries to bait people into pressing the like button because they want more likes on their post.
Examples below.
Commenter: (blank) gang here.
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Commenter: Cringe button.
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Commenter: People who like (blank).
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Replies: (usually completely oblivious that they are being baited into liking the comment)
The one dude who actually knows what's going on: "like beggar."
Brought to public attention by Bob Woodward and Carl Bernstein in the book on the fall of Richard Nixon, All The President’s Men, ratfucker was Nixon’s term for a political operative who sows chaos among opponents; an agent provocateur. It is thought to have originated among campus political rivalries at USC, and seems to have some usage in the US military.
Along with Nixon’s other ratfuckers, Roger Stone caused fights at otherwise peaceful Democratic Party protests to generate a false narrative that the Democrats were violent and dangerous.