someone of the opposite sex that you meet and realize they are fat and ugly. But you originally thought they where attractive.
that girl ended up being a decepticon when i saw her pic
by negro October 17, 2004
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Male or female that appears attractive from either far away, in photos, from the back but turns out to be very ugly or plain in person or up close.
Matt's cousin looks hot in his Facebook photo but turned out to be a Decepticon.
by bk11214 July 5, 2009
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Someone that thinks they're a gender but obviously they're not.
"Transgenders gay dudes in disguise"
"Transgenders that's a bunch of guys" that's a decepticon bro.
by Handful of sin November 4, 2022
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A person who one gender but acts and dresses like the opposite gender or wants to be the opposite gender
by Mud33 January 4, 2019
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a mixed word that is created from two words. ie,
Deceptive and Con artist
Deceiving and Conniving

synonym; shapeshifter, phoney, fake, fraud
That phoney decepticon is a manipulative, back stabber.
by SeeThroughMASKS May 12, 2021
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A woman who looks very attractive from behind, but when she turns around she's disappointingly ugly.

A decepticon can also refer to an older women who dresses much younger than she should in order to trick men into checking her out. This method of deception only works at a distance.
Guy #1: "Hey look at that hot chick sitting at the bar."
Guy #2: "Just be careful, she might be a decepticon."
by AceWoody November 2, 2011
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An insult. You call a person a decepticon if you they have done something nasty to you or they have are not allowing you to do something.Used as a substitue for the word evil .
'dont be a Decepticon'

' ugh ur such a Decepticon'
by Autobot Ninja October 2, 2009
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