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1.
(noun/verb) 1. A person who watches another person stalk friends on the social site Facebook. This usually takes place in lecture, during class, on a bus, or in the library.
2. An unintentional stalking of people on Facebook through someone else's account by watching those person's actions on their monitor.

3. The act of watching someone stalk someone else.
4. Shortened usually to "sefast"
I was in lecture today and I was such a secondary facebook stalker towards the people in front of me. They were all on Facebook and I couldn't stop looking!
by Mass Texter November 08, 2010