This word is derived from a misspelling of "Deceiver". It has risen in popularity with the rise and prominence of Facebook's Marketplace.

A Deceder is someone who constantly lowballs people but also lies about market price.

Usually a noun, it can also occasionally be used as an adjective.
I knew my comic was worth $100, and this Deceder guy said he'd give me 70% of value, but then when we met up in person he claimed it was only worth $80, and tried to pay me $56. Just a huge waste of time.

That guy was such a Deceder, you'd think he was from Austin TX, home of the lowball king, and "Following for Price Drop."
by JoshUABattle July 27, 2021
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(adj.)

Dead.

Origin: as a funny way of pronouncing deceased.
Easy E is deceded, HIV took him from us.
by Charlie Murphey July 7, 2009
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A person who wants to be like a Spartan but has no background or any spartan blood in them. Someone who thinks they are Leonidas from 300
Naming a kid Leonidas. Im a Sparta Decedent

EX: Leonidas is my son
by The Kid1230 May 23, 2011
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