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1. n. A physical or online event or experience that is the opposite of fun, ie: boring.
example: I'm glad to finally escape from that book club meeting--it was an absolute borefest.
by quantazelle March 20, 2009
If something is really boring
"This is a complete bore fest"

or could even just be said:
Guy 1 "Bore fest"
Guy 2 "Definately"
by PikiePoo July 07, 2008