1. to turn on someone you trust, or to have someone do the same to you.
2. team-killing, i.e. in a FPS. More specifically, this is the term used when one team-kills in Halo/Halo 2.
1. i had the worst betrayal the other day, when my best friend whom i thought i trusted stole my girlfriend.

2. Halo announcer: "Lost the lead! BETRAYAL!"
by Tengu October 05, 2006
Top Definition
1. putting loyalty in someone, and them turning theirs on you.
2. friends stabbing you in the back.
3. the most hurtful thing anyone can do.
person 1: hey i like you
person 2: like you too.
person 1: see you later
person 3: who was that
person 2: some psycho weirdo

person1: now i feel betrayal
by crypticss December 28, 2009
Betrayal is when your fucking girlfriend decides to make up with/engage in sexual acts with another guy after all the great things you've given, offered, bought, done to her, with the excuse of "wanting to get more experience", thus leaving you with a broken spirit and with a bunch of emotions of hatred, loss of self-respect, loss of self-confidence, loneliness and total fucking sadness.
After all these things i've done and sacrificed for her, Eve's betrayal proves that she is just a little whore and that i shouldn't have given her that much value.
by JayLoomis October 08, 2014
You were booted from the game for betraying a teammate.
I committed betrayal on my teammates on Halo 3.
by dickman 2.0 April 10, 2010
When your best friend deserts you for mean reasons and acts like a meany head.
Kristian Farnsworth left her bestest friend alone in the cold in a mean act of betrayal.
by wordsfromtheheart December 22, 2013
When your boyfriend "the cop" Says he is going to write your best friend up for smoking weed.
by Angry girfreind June 08, 2009
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