wdyf 

It means who did you fuck.

Saniah: OMG I saw you talking to all those boys!
Justine: Yea
Saniah: So Wdyf
Justine: Lmao

wdyf by Hola puta September 21, 2016

WDYFU? 

What don't you fucking Understand?

Christian Bale ( to lighting guy Bruce):

"are you professional or not?
what the fuck , are you walking right through my set, just
ah da-da da-da
WDYFU?"

WDYFU? by Asada February 4, 2009

wdyfm

Stands for, “what do you fucking mean?” Can be used either sarcastically or seriously.

Texter 1: I hate food.
Texter 2: wdyfm you hate food lmao??

wdyfm by Jadeite7 June 7, 2018

wdyfmb 

What do you fucking mean bitch

Justin: wdyfmb that u never want to see me again
Jessica: you let your friend rape me so what I mean I don't want anything with u or your friend

wdyfmb by The best of Hannah baker April 23, 2017