To kick a perfectly good opportunity away. Derived from the Springbok Rugby player Faf de Klerk who has a habit of doing just that.
Some people grab the bull with both horns and others just Faf it.

Dude, why didn't you get that girls number, you totally Faffed that.

Pass me the ball.
No I'm going to Faf it into the air so that the other side can have it.
by Harvmeister November 01, 2019
Get the mug
Get a Faf mug for your guy Julia.
Did you hear about Chloe's "best friends" they were faf!
Evelyn and Moe are faf.
via giphy
by Emyj October 09, 2019
Get the mug
Get a FAF mug for your cat Yasemin.
A fake ass fan aka a band wagoner fan
Sophia is a FAF of the dodgers since they became good.
by Fake AF March 22, 2018
Get the merch
Get the FAF neck gaiter and mug.
Means, when you are annoyed with sneakey underhand tactics and lies "Fuck Austin Fraser"
I am sick of you FAF
by HKLegend September 23, 2019
Get the mug
Get a FAF mug for your fish Nathalie.