Noun/verb/adjective: Someone who forwards you old links, videos, and pics that everyone has already seen. Also the act of forwarding old links, or as a description of the old links.
NOUN-Rip Van Linkle is constantly IMing me 2 week old viral crap. Fail.
VERB- He Rip Van Linkled me some LOLCATZ and Autotune Obama. Fail.
ADJ-Rip Van Linkle post- that vid was on Tosh.0 two weeks ago and has been remixed five times including an autotune. Fail.