The act of having anal sex with a girl or guy while she shits on the tip of your penis. She or he will then shove the shit into your urethra using their tongue.
Flaking is what a Nikos does when he make plans with his friends, yet fails to show up last minute. This usually includes the Nikos leaving his friends on read and not telling them about changed plans beforehand.
"Yo, this Nikos is flaking on us today again! That's the sixth time this week, bruh. What an asshole."