A person who bails out on a commitment at the very last minute.
Tim is such a flaker. I can't believe that he bailed out the very last minute! I'm definitely not inviting him to hang out next time.
by Zain Cheng February 17, 2006
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Is someone who plans on attending an event and never calls to state they wont be there.
icky-wicky is a FLAKER because she always says she will show up to a party but never does.
by Big Rick September 17, 2007
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Is someone who always makes plans to attend a event and comes up with a pathetic excuse to bail out every time.
1. Tucker made plans to go to Vegas, then bailed on me last minute. What a flaker.....

2. Wesley and I where suposed to go watch the game at the bar but he flaked out.
by hectorbg February 11, 2010
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Is a scientist who is dealing with exfoliated flakes like graphene or other nanocomposites.
John tries to be the best flaker. He wants to make good ohmic contacts to the flakes.
by Big scientist October 12, 2012
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to not be able to attend an engagement with a friend or family member without proper notification.
Me and vanessa were supposed to meet at the movies on saturday at 5 but come saturday at 5 i was at the movie theater and she never showed up and never bothered to even let me know she wasn't coming. I guess she's a flaker.
by kr1818 September 10, 2009
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