Top Definition
An error similar to Error 404 but one step higher. The equivalent of your web browser saying "Fuck not given"
Guy1: So I went to take an exam the morning after my girlfriend broke up with me. When I looked at the exam I suddenly encountered Error405.

Guy2: Dude that sucks.

Dude: I tried to download that video you told me about and my computer gave me an error 405
Dude2: dude your computer doesn't give a fuck
by Squishy-phil October 19, 2011
Error 404, after an upgrade.
Error 405: This Windows is a piece of shit.
by DragonlordALS May 25, 2004
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