1 definition by Oppa's Club

Top Definition
Someone who does not show up when they had previously stated they will. Also, someone who has no intention of showing up, but acts like they will or want to show up only to mess with your feelings.
Simona is a flaker, she said she wanted to catch the game, but she met up with her real friends instead.
by Oppa's Club February 22, 2012
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