When an individual reposts a link, quote, pictures, etc. on Facebook without crediting the person from which they were originally shown the material. The original poster usually comments the newly reposted material saying "umm...i showed you that" complete with nuances of irritation and a "wtf" feeling since you did not credit their name.

Usually used in cases of extremely viral, common, and clichéd material; therefore, a shout out is generally not expected.
"check out miss teen south carolina hahahaha"

comment: "UMMMM wow i showed you that."
by cal polyy October 4, 2009
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A term used in /r/nosleep
about a person who finds a tape on stinson beach. Which changes people. And gave a woman nightmares about the tape etc. etc.
GUY #1: HEY WE NEED TO TALK!!!
GUY #2:Just go to stinson beach. I need to show you something
GUY#1: omfg stfu I wont go down there I will die :(
by Stinson Beach August 2, 2011
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