I think you mean WYT. It stands for Whatever You Think. Maybe the person that wrote it wrote it wrong. I don't think WYF stands for anything, unless you make one for it.
WYF means "With Yarn in Front".
It could mean whatever you fancy.
Inbd mean "It's no big deal" in text language.
The acronym WYF can mean World Youth Festival or "what's your fancy?" The common word is "wife" (female spouse).
BTW means By The Way in text language
A wyf is an obsolete term for a wife.
in text language ttfn means ta ta for now
Inbd mean "It's no big deal" in text language.
defo
RUS in text means "are you serious".
To Be Fair
forget it