The act of pretending to "set up" for a high five, only to scream "Betrayal Five" and then to slap the chest area of a friend. This is normally done to throw the friend off-balance or to steal something that they have. This term was coined by Todd in the TV show Scrubs.
Steve: Dude, I just found a $20 bill laying on the ground!
John: Sweet! ...Betrayal five!

*John slaps Steve, Steve drops the $20 bill, John picks it up and walks away.*

Steve: Damn.
by Bryceter August 17, 2007
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It starts out like a high five, you raise your hand and when the other person raises their hand, start to do a normal high five but right before your hands touch, bring down your hand, rotate your hand 90° to the right and tilt it forward so it should just be your hand is horizontal with the palm facing down, dodge their high five, and karate chop them in either the chest or stomach. For added effect, say "High Five!" before and then say "Betrayal Five!" after you hit them.
Shawn: High-five, dude!
Albert: Yeah!
^Instead of a high five, Shawn slaps Albert in the chest area^
Shawn: Betrayal-five!
by Psyber Kayos January 7, 2008
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A thumbnail betrayal occurs on social networking sites such as facebook (the application 'are you interested' for example) when a male or female look really hot in their display picture, so u click thinking 'hell yea this is sweet' only to find out that they must have used some sort of magic 'grotesque removing' camera to take that picture with because they are, in fact, like a pile of shit which has been puked on. . attached to a bean bag chair. . with hair. .
dude: sweet this girl is hot *clicks*
dude 2: yea she looks sweet, look at her other photos
dude: omg ewwwww that was a pure thumbnail betrayal!! *gips*
by muse rock August 11, 2008
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And underhanded Gobbo that fails to read fine print and sells his friends to hell for 5 gold.
Jerry is such a Betrayal Goblin. He ate everyone's breakfaasts.
by IceStormLily November 11, 2020
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When a cockring is shared with a different partner who has an STD.
I wanted to fuck my partner in more way than one, so I gave them the Circle of Betrayal
by You_Have_No_Idea December 9, 2019
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-The heaviest most disasterous band in the history of existence and which is probably the coolest thing since sliced bread. Made up of 4 masterminds, biggie, ed, dan, tom, who will soon be in the musical hall of fame for pure geniusness.

-A Band that condones violence to the fullest.
EX: kid1: yo dude what are you doin tonight?
kid2: hopefully slaughtering innocent people to portray the betrayer.
by portray_the_betrayer April 28, 2009
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Someone who was your besie and had at least 1- 14 word conversation with you and them betrays you like the little bitch he is. They are found in all shapes and forms. Be care full because your bestie may become a betrayal bestie.
Lauryn: HEY HANSON
Hanson: ...
Lauryn: why are you ignoring me

Hanson: Cause you are embarrassing
Matha: huh seems like at Betrayal Bestie
by TheCultoftheBeatsproutGrowers December 5, 2019
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