MBMFN

must be mother fucking nice

Kathy: Getting my AC fixed today--YAYYY!
Adam: MBMFN!!!

MBMFN by ROGER_MELLIE July 23, 2010

MBFN 

Must Be Fucking Nice

Jack has the next week off of work because of sick days not used. He's already used his vacation earlier this year. MBFN.

MBFN by Mike Max. June 30, 2011

mbffn 

it stands for Male Best Friend For Now
it is used by more pessimistic people who expect there male bff not to stick around for ever

your my mbffn

mbffn by the one... yes that one February 20, 2017

Mbfn 

Must be fucking nice

My best friend and her boy friend just made 2 year mbfn.

Mbfn by Aye 🖍 August 15, 2018

Mbfn 

Must be fucking nice

You have 3 days off this week mbfn

Mbfn by Roxieana December 5, 2018

mbvmfn 

Must be very mother fucking nice

MBVMFN to live in a house like that

mbvmfn by Lauren1999 July 25, 2017

Mbfn 

"Must be fucking nice"

Mbfn=An exprecion to difene a feeling .

Mbfn by Miss know it all... March 9, 2018