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 May 01, 2012

1. Someone who fails to honor commitments, either by making excuses or simply not showing up to the planned event.
2. Someone who regularly does cocaine, an illicit substance referred to by some as "flake."
2. Someone who regularly does cocaine, an illicit substance referred to by some as "flake."
It's been half an hour and Leo hasn't shown up- that fucking flaker.
You can't just snort the coke on my dinner table, you flaker!
You can't just snort the coke on my dinner table, you flaker!
by TyrianTyrell October 27, 2019

by shaq3212 March 18, 2013

by Flaker879 February 10, 2015

by Thisdefinitonis100%trustworthy October 15, 2015

Slang for a person who has proven to be unreliable in following through with plans (often for gatherings or public outings).
by Magical Industry July 22, 2019

Guy1: Hey im about to watch the Laker game.
Guy2: Oh you mean the flakers? They suck.
Guy1: Umm yeaaa.. why are they "flakers"? they're like one of the best teams in the NBA.
Guy2: I hate em. They suck.
Guy1: haha ok man.
Guy2: Oh you mean the flakers? They suck.
Guy1: Umm yeaaa.. why are they "flakers"? they're like one of the best teams in the NBA.
Guy2: I hate em. They suck.
Guy1: haha ok man.
by HaroldCrick June 10, 2009
