fwns 

abbreviation for "fucking owns"
Meaning: Total domination or ownage.

Also see wordfwned/word.

Urbandictionary.com fwns!

fwns by Bobby October 20, 2003

FWNSB 

Friends with non sexual benefits. It’s an FWB but strictly platonic, I promise.

You: Hey, have you done anything with that person, if you what I mean?

Them: Nah, they’re just a FWNSB, I’d never.

FWNSB by supaluigibrutha May 14, 2021