A FLAKE is ONLY when a person does NOT inform the person/parties AHEAD* of time that he is unable to make the engagement. On dates, people get STOOD UP. At events, he is considered a NO-SHOW.
Later, flakes generally give lame excuses for their absence or attempt to ignore their behavior altogether.
* A flake is NOT necessarily someone who is LATE or someone who informs the party ahead of time that they are unable to make the event.
“Ya know, Bob is such a flake. He coulda (at least) called to let us know that he wasn’t gonna show up.”
Someone who doesn't have the balls to tell you they're busy and can't hang out, but still makes plans to 'chillax' so you go out of your way to 'chill' with said flaker, only to have them flake out on you, and then give you some lame ass no ball excuse instead of just being straight up that they're a flakey flake
Per Wall 'Wanna hang out'
Dumb Girlfriend 'Hehehe OK'
Dumb Girlfriend at meet spot, No Per wall at meeting spot
Per Walls Dumb excuse 'I was skateboarding'
Dumb girlfriend crying on phone to friend 'He is such a flake'
(verb) The verb flake is probably derived from the noun flake. The verb means to act like a flake by being unreliable, particularly by not showing up at an agreed upon time or place.