YNF 

YNF- "You're Not Funny"- the abbreviation posted to a social media site after someone makes a comment that is a failed attempt at comedy. Particularly good to use when the person is being passive aggressive OR is one of those people that comes out of the woodworks to grace the world with their "comedic genius".

Original Post: I'm so sick of work!
Comment 1: Oh really? Are you allergic to it? Is that why you are sick? You should get some meds for that.
Comment 2: YNF

YNF by Jathaggio March 21, 2015

ynf 

your nigga’s favorite

i’m ynf tbh

ynf by omwtfyn December 24, 2021

YNFC 

Used to abbreviate the saying 'You're Not Fucking Cool'.

Can be used before or after sentence or celebrity

You're Not Fucking Cool b/c you have an iphone #YNFC

@kimkardashina #YNFC

YNFC by That Dude Joel July 20, 2012

YNFB 

"You're not funny boy": An abbreviation posted to a thread on a web-based forum when the poster knows that his mother would not approve of what was just said. Adapted from the abbreviation YMMV.

Original Poster (OP): Did you see the deal online for 10 steaks shipped free when registering for the Reading for kids program?
Second poster: Yawp. Already got the shipping confirmation for 100 steaks to my apartment.

Original poster (OP): Noiceeeee. YNFB.

YNFB by 733tp0st3r October 29, 2012

YNFA 

YNFA (You're Not Famous Anymore) is a page set up by Manchester United fans that trolls and pokes fun at everything about Liverpool Football Club.

Mancunian: "What football team do you support mate?"
Scouser: "Liverpool Football Club mate."
Mancunian: "Hahahahaha!!! You support that shite club? You haven't won the league in 27 years! Do you realise You're Not Famous Anymore YNFA!!!"

YNFA by Aladcalledjason September 16, 2017

YNFB 

Ya nigga favorite bitch like yo man hot yhu but got too

His girlfriend:who yhu

Me: YNFB aka ya nigga favorite bitch

YNFB by Unthinkable happened August 3, 2019

ynfk 

You Never Fucking Know

"She might turn out to be hot, but YNFK."

ynfk by jjkobe October 30, 2017