Canada Post, Express Post and Priority Post.
"Hey dude your parcel here yet?"

"No dude fail post doesn't fail on the weekend so I have to wait till monday."

-

"Hey dude where's your parcel at man?"

"Fail post dropped by when I wasn't at home so I have to wait another two days until the failman returns it to the faildepot."
by Earwiggs February 3, 2009
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A reply on a forum that is useless and stupid in a multiplex of ways, also a post whose poster failed to deliver the lulz.
Triton: this thread is retarded lol
benol: Just like your mom! Ooh, burn!

benol: go um... do something bad or something.

Skyone: That was a fail post
by benol September 17, 2007
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When a person post anything three times or more due failure to realize it went through the last time. Most prevalent on facebook.
Status: Listening to King Crimson
Tim's Comment: FUCK YEAH! KING CRIMSON!
Tim's Comment: FUCK YEAH! KING CRIMSON!
Tim's Comment: FUCK YEAH! KING CRIMSON!
John's Comment: Triple-Post Fail
by imthatawesome October 16, 2010
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PFSD-A Severe Anxiety Disorder that comes upon oneself after her or she fails to have successful sex with someone, PFSD tends to be more common in males than females due to ED.
Bob went through some extreme Post-Failed Sex disorder after failing to "Get it up" while attempting to have sex with his girlfriend.
by Nross June 8, 2011
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