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A person who hits the 'Like' button on everything they see on Facebook, even if they've never heard of the thing they're liking. They're like a dog who licks everything, including your shoe and your ex's face.
I liked 27 of his posts because I was bored and he looked cute.
I liked the group 'People Who Hate Math' even though I’m in the group and I still hate math.
I put 'Attending' on every event, even though I live in a different state.