Top Definition
When you're friends with someone and you do something including, but not limited to: giving someone the silent treatment, spray-painting their car, not calling/texting you for an extended period, giving away secrets, burning a holiday dish and hiding it in your attic, deleting the contents of your DVR, and/or deleting you on a social network.
-"Thanks for ignoring me at work after we talked for seven hours last night, friendship betrayer."
-"Well you had a party and didn't invite me, so actually, you are the one committing frienship betrayal."
by Lizwarrior139 December 23, 2010
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