1. A genetically engineered creature composed entirely of organic substance designed to look and act human.
2. An android.

Replicants are distinguished from humans using the Voight-Kampff machine.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Social media term for someone who recites information unaware if its correct or not for the sake of repeating it to increase their own perceived "social standing" in a social community. Can apply to any online community such as a forum, a group of sites of communities/threads (i.e. reddit), or a solitary person. They are usually seeking something such as attention, approval, and/or money.